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1 tapped room
Безопасность: помещение, в котором к телефонным линиям или аппаратам подключены устройства подслушивания -
2 tapped room
помещение с подключенными (к телефонным линиям или аппаратам) устройствами подслушиванияАнгло-русский словарь по компьютерной безопасности > tapped room
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3 room
помещение; зал; камера -
4 filter
1) фильтр || фильтровать2) светофильтр•-
absorbent-type filter
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absorbent filter
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absorbing filter
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absorption filter
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ac line filter
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ac supply filter
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acoustic filter
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acousto-optical filter
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activated carbon filter
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active filter
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active power filter
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adaptive filter
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adaptive notch filter
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additive color filter
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additive filter
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adjustable density filter
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aerolescer pneumatic filter
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aerosol filter
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agile filter
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air filter
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air-conditioning filter
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air-intake filter
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all-dielectric interference filter
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all-pass filter
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all-pole filter
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all-zero filter
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ambient-light filter
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analog filter
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analog postsampling filter
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analog presampling filter
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anion-exchange filter
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antialiasing filter
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antialias filter
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aperture filter
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ash-free filter
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attenuator filter
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audio band-pass filter
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auto filter
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automatic drain filter
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bacterial filter
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bacteriological filter
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bag filter
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balanced filter
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band split filter
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band vacuum filter
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band-elimination filter
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band-exclusion filter
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band-limited filter
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band-pass filter
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band-rejection filter
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band-selective filter
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band-stop filter
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bandwidth filter
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bath filter
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beacon filter
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beat-interference filter
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belt filter
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bilithic filter
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binary filter
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biological filter
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blanket filter
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blue filter
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branching filter
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bridge filter
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broadband filter
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Butters filter
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Butterworth filter
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bypass filter
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bypass hydraulic filter
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candle filter
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canonical recursive filter
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capacitive filter
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capacitor filter
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cartridge filter
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cation-exchange filter
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Cauer filter
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cavity band-pass filter
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cavity filter
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cavity-coupled filter
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centrifugal air filter
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centrifugal filter
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centrifugal oil filter
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ceramic filter
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channel bank filter
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channel filter
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channel separating filter
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channel television filter
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Chebyshev filter
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chirp filter
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choke filter
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chroma filter
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chrominance notch filter
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click filter
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clogged filter
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cloth filter
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clutter suppression filter
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clutter filter
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C-message filter
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coalescing filter
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coarse filter
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coarse fuel filter
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coarse-grained filter
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coarse-mesh filter
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coaxial direct coupled resonator filter
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coaxial filter
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color filter
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color-balancing filter
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color-compensating filter
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color-correcting filter
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color-encoding filter
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color-separation filter
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color-stripe filter
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color-subcarrier notch filter
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color-trimming filter
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comb filter
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combined fuel filter
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compensating filter
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compensation filter
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contact filter
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continuously variable filter
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convolution filter
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correcting filter
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correction filter
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cross coupling filter
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crystal filter
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cyan filter
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dark-room filter
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dechirping filter
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decimation filter
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decision-feedback filter
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decoupling filter
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deemphasis filter
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deer-skin filter
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dehydrator filter
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delay-line filter
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depth filter
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detarring filter
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dewatering filter
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dielectric filter
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dielectric resonator filter
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diesel and fuel-oil filter
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digital elliptic filter
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digital filter
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digital matched filter
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digitally controlled filter
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discrete filter
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discrete-time linear filter
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discrimination filter
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disk filter
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disk vacuum filter
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dispersion filter
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dispersive filter
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disposable element filter
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disposable hydraulic filter
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distributed-constant filter
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distributed-element filter
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Doppler filter
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downward-flow filter
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drainage filter
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drum filter
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drum vacuum filter
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dry electrical filter
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dry filter
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drying filter
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dual hydraulic filter
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dual-split filter
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duplex filter
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dust filter
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easy-off filter
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edge-type disk filter
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effects filter
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electric filter
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electromechanical filter
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electronically tunable filter
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elimination filter
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elliptic filter
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enhancement filter
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enlarging filter
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envelope filter
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equalized filter
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equiripple filter
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externally mounted filter
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extraripple filter
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fabric filter
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fan filter
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feedback filter
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feedthrough filter
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ferrite-tunable filter
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fiberglass filter
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fibrous filter
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film filter
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final filter
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fine fuel filter
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finite-duration impulse-response filter
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finite impulse-response filter
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fixed target rejection filter
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fixed-frequency filter
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fixed filter
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float drain filter
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fog filter
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frequency filter
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frequency-selective filter
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front-end filter
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fuel filter
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fuel primary filter
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full-flow filter
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full-flow powdered ion-exchange filter
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Gaussian filter
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gauze filter
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gelatin filter
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generating filter
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glass filter
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glovebox filter
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graded filter
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gravel filter
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gravel packed filter
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gravel-sand filter
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gravitation filter
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gravity filter
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gray filter
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grease filter
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guard filter
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gyrator filter
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harmonic filter
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H-cation filter
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heat filter
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heavy oil filter
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HEPA filter
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high-cut filter
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high-frequency filter
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high-pass filter
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high-pressure filter
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high-rate filter
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high-temperature filter
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holographic filter
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hose air-jet filter
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hose pressure filter
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hose suction filter
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hot filter
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hum-eliminating filter
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hum filter
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hydraulic filter
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I filter
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IIR filter
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image-deblurring filter
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image-reflection filter
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impingement filter
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inductive filter
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infinite-duration impulse-response filter
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infinite impulse-response filter
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infrared filter
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in-line filter
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input filter
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insert filter
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intake filter
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in-tank filter
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integral oil filter
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integrate-and-dump filter
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integrating filter
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interdigital filter
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interference filter
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intermediate-frequency filter
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interpolation filter
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inverse filter
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inverted filter
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ion-exchange filter
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isolation filter
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jet filter
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Kalman filter
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keying filter
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ladder-type filter
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ladder filter
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lag filter
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lattice filter
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leapfrog filter
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light filter
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line filter
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linear filter
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loop filter
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low-cut filter
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low-frequency filter
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low-pass filter
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low-pass sampling filter
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low-pass zonal filter
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low-pressure filter
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low-rate filter
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L-type hydraulic filter
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lubrication filter
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lumped-constant filter
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lumped-element filter
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magnetic filter
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mandrel wrap filter
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mantle filter
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mash filter
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mass filter
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matched filter
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matching filter
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maximal ripple filter
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maximally-flat filter
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mechanical-wave filter
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mechanical filter
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membrane filter
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meshwire filter
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mesh filter
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metal disk fuel filter
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micronic filter
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microstrip filter
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microwave filter
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millipore filter
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mineral filter
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minimum-delay filter
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minimum-phase filter
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mirror filter
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mismatched filter
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mist filter
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mode filter
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modular hydraulic filter
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modulation filter
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monopole mass filter
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mosaic filter
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multibag filter
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multiband filter
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multicavity microwave filter
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multiple resonator filter
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multisection filter
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multistage filter
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narrow-band filter
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neutral-density filter
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neutral filter
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neutralizing filter
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never stop filter
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night filter
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noise filter
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nonclogging filter
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nonlinear filter
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nonminimum phase filter
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nonrecursive filter
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North matching filter
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notch filter
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nutsch filter
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octave filter
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oil bath filter
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oil filter
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oil-bath air filter
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one-pole filter
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on-line installable filter
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optical filter
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output filter
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outside-in filter
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pack filter
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paper filter
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partial flow filter
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partial flow hydraulic filter
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pass-band filter
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passive filter
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percolating filter
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percolation filter
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phase filter
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pilot filter
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pipeless filter
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pi-section filter
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plate-type filter
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plate filter
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plugged filter
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polarization filter
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polarizing filter
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polaroid filter
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pole-zero filter
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porous metal filter
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postdigitizing filter
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postemphasis filter
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postequalization filter
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postsampling filter
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powder filter
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power-line filter
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precoat filter
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prediction filter
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predictive-error filter
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predigitizing filter
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preliminary filter
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presampling filter
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pressure filter
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pressure line filter
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primary filter
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prime filter
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programmable filter
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proportional filter
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psophometric filter
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pulse-compression filter
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pulse-jet filter
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purified-helium dust filter
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Q filter
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quad filter
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quadrature mirror filter
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quadrupole mass filter
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quartz filter
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quick removal filter
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rapid filter
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reconstruction filter
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rectifier filter
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recursive filter
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rejection filter
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repulp filter
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resonant filter
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return filter
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return oil filter
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reverse filter
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RF filter
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ripple filter
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roll-off filter
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rotary filter
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safety filter
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sampled-data filter
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sand filter
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SAW filter
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scatter filter
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screen filter
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screw-in filter
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scrubber filter
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scrubbing filter
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second order damped filter
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secondary air filter
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secondary filter
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security filter
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selective filter
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self-aligning filter
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self-blowing drum filter
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self-cleaning filter
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self-tuning filter
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separation filter
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sewage filter
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shaping filter
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sharp-cutoff filter
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shunt filter
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sideband filter
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signal-separation filter
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silica gel filter
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sintered filter
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sintered glass filter
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sintered metal filter
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smoke filter
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smoothing filter
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sniffing filter
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softening filter
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solid-state filter
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spatial filter
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spatiotemporal filter
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sponge filter
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standard-rate filter
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star filter
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state-variable filter
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stop-band
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streamline filter
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striped-color filter
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striped filter
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strip-line filter
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submersible filter
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subtractive color filter
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subtractive filter
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suction filter
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suppression filter
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surface-acoustic-wave filter
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swept filter
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switched-capacitor filter
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synchronous filter
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synthetic fiber dust filter
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tapped-delay line filter
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telltale filter
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textile filter
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Thomson filter
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through filter
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throw-away filter
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time-varying filter
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toe filter
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total filter
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tracking filter
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transmission filter
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transparency filter
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transversal filter
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trickling filter
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tricolor filters
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trimming filter
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T-type hydraulic filter
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tubular cloth filter
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tunable filter
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tuned filter
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two-stage hydraulic filter
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ultraviolet filter
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unmatched filter
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vacuum filter
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variable band-pass filter
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variable density filter
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variable filter
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velocity filter
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ventilation filter
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vestigial sideband filter
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video filter
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viscous filter
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voice filter
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wadding filter
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wash hydraulic filter
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water filter
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wave filter
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waveguide direct coupled resonator filter
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waveguide filter
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wedge interference filter
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weighting filter
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weight filter
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wet electrical filter
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wet filter
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whitening filter
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wide-band filter
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Wiener filter
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wire mesh filter
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wire screen filter
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YIG filter
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zero-memory filter
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zonal filter -
5 on
on [ɒn]sur ⇒ 1A (a)-(d), 1A (f), 1B (a), 1C (a), 1C (d), 1D (a)-(c), 1D (j) à ⇒ 1A (c), 1D (f), 1D (h), 1D (i), 1D (j), 1F (c), 1F (f) en ⇒ 1A (c), 1F (g) par rapport à ⇒ 1C (e) selon ⇒ 1D (d) de ⇒ 1F (d) allumé ⇒ 3 (a) ouvert ⇒ 3 (a) en marche ⇒ 3 (a) de garde ⇒ 3 (c) de service ⇒ 3 (c)A.(a) (specifying position) sur;∎ the vase is on the shelf le vase est sur l'étagère;∎ put it on the shelf mets-le sur l'étagère;∎ on the floor par terre;∎ on the ceiling au plafond;∎ there are posters on the walls il y a des affiches aux ou sur les murs;∎ there was blood on the walls il y avait du sang sur les murs;∎ a coat was hanging on the hook un manteau était accroché à la patère;∎ the post with the seagull on it le poteau sur lequel il y a la mouette;∎ he has a ring on his finger il a une bague au doigt;∎ to lie on one's back/side être allongé sur le dos/côté;∎ on this side de ce côté;∎ on the other side of the page de l'autre côté de la page;∎ on page four à la quatrième page, à la page quatre;∎ on the left/right à gauche/droite∎ I had nothing to write on je n'avais rien sur quoi écrire;∎ red on a green background rouge sur un fond vert(c) (indicating general location, area)∎ he works on a building site il travaille sur un chantier;∎ they live on a farm ils habitent une ferme;∎ there's been an accident on the M1 il y a eu un accident sur la M1;∎ room on the second floor chambre au second (étage);∎ on Arran/the Isle of Wight sur Arran/l'île de Wight;∎ on Corsica/Crete en Corse/Crète;∎ on Majorca/Minorca à Majorque/Minorque∎ I kissed him on the cheek je l'ai embrassé sur la joue;∎ someone tapped me on the shoulder quelqu'un m'a tapé sur l'épaule∎ the village is right on the lake/sea le village est juste au bord du lac/de la mer(f) (indicating movement, direction)∎ the mirror fell on the floor la glace est tombée par terre;∎ to climb on(to) a wall grimper sur un mur;∎ they marched on the capital ils marchèrent sur la capitale;∎ don't tread on it ne marchez pas dessusB.∎ I only had £10 on me je n'avais que 10 livres sur moi;∎ she's got a gun on her elle est armée∎ he had a scornful smile on his face il affichait un sourire plein de méprisC.(a) (indicating purpose of money, time, effort spent) sur;∎ I spent hours on that essay j'ai passé des heures sur cette dissertation;∎ she spent £1,000 on her new stereo elle a dépensé 1000 livres pour acheter sa nouvelle chaîne hi-fi;∎ to put money on a horse parier ou miser sur un cheval;∎ what are you working on at the moment? sur quoi travaillez-vous en ce moment?∎ I am here on business je suis ici pour affaires;∎ to be on strike être en grève;∎ he's off on a trip to Brazil il part pour un voyage au Brésil;∎ to go on safari faire un safari;∎ she was sent on a course on l'a envoyée suivre des cours;∎ I'm on nights next week je suis de nuit la semaine prochaine;∎ he's on lunch/a break il est en train de déjeuner/faire la pause;∎ she's been on the committee for years ça fait des années qu'elle siège au comité(c) (indicating special interest, pursuit)∎ she's keen on music elle a la passion de la musique;∎ he's good on modern history il excelle en histoire moderne;∎ she's very big on equal opportunities l'égalité des chances, c'est son cheval de bataille∎ on a large/small scale sur une grande/petite échelle(e) (compared with) par rapport à;∎ imports are up/down on last year les importations sont en hausse/en baisse par rapport à l'année dernière;∎ it's an improvement on the old system c'est une amélioration par rapport à l'ancien systèmeD.(a) (about, on the subject of) sur;∎ a book/film on the French Revolution un livre/film sur la Révolution française;∎ we all agree on that point nous sommes tous d'accord sur ce point;∎ I need some advice on a legal matter j'ai besoin de conseils sur un point légal;∎ could I speak to you on a matter of some delicacy? pourrais-je vous parler d'une affaire assez délicate?;∎ the police have nothing on him la police n'a rien sur lui(b) (indicating person, thing affected) sur;∎ it has no effect on them cela n'a aucun effet sur eux;∎ a tax on alcohol une taxe sur les boissons alcoolisées;∎ try it on your parents essaie-le sur tes parents;∎ the government must act on inflation le gouvernement doit prendre des mesures contre l'inflation;∎ he has survived two attempts on his life il a échappé à deux tentatives d'assassinat;∎ it's unfair on women c'est injuste envers les femmes;∎ the joke's on you! c'est toi qui as l'air ridicule!∎ I cut my finger on a piece of glass je me suis coupé le doigt sur un morceau de verre(d) (according to) selon;∎ everyone will be judged on their merits chacun sera jugé selon ses mérites;∎ candidates are selected on their examination results les candidats sont choisis en fonction des résultats qu'ils ont obtenus à l'examen(e) (indicating reason, motive for action)∎ on impulse sur un coup de tête;∎ the police acted on information from abroad la police est intervenue après avoir reçu des renseignements de l'étranger;∎ I shall refuse on principle je refuserai par principe(f) (included in, forming part of)∎ your name isn't on the list votre nom n'est pas sur la liste;∎ the books on the syllabus les livres au programme;∎ on the agenda à l'ordre du jour(g) (indicating method, system)∎ they work on a rota system ils travaillent par roulement;∎ reorganized on a more rational basis réorganisé sur une base plus rationnelle∎ on foot/horseback à pied/cheval;∎ on the bus/train dans le bus/train;∎ she arrived on the midday bus/train elle est arrivée par le bus/train de midi;∎ on a bicycle à bicyclette∎ to play a tune on the flute jouer un air à la flûte;∎ who's on guitar/on drums? qui est à la guitare/à la batterie?∎ , Television & Theatre I heard it on the radio/on television je l'ai entendu à la radio/à la télévision;∎ it's the first time she's been on television c'est la première fois qu'elle passe à la télévision;∎ what's on the other channel or side? qu'est-ce qu'il y a sur l'autre chaîne?;∎ on stage sur scène∎ it's all on computer tout est sur ordinateur;∎ on file sur fichierE.INDICATING DATE, TIME ETC∎ on the 6th of July le 6 juillet;∎ on or about the 12th vers le 12;∎ on Christmas Day le jour de Noël;∎ I'll see her on Monday je la vois lundi;∎ on Monday morning lundi matin;∎ I don't work on Mondays je ne travaille pas le lundi;∎ on a Monday morning in February un lundi matin (du mois) de février;∎ on a fine day in June par une belle journée de juin;∎ on time à l'heure;∎ every hour on the hour à chaque heure;∎ it's just on five o'clock il est cinq heures pile;∎ just on a year ago (approximately) il y a près d'un anF.∎ have a drink on me prenez un verre, c'est moi qui offre;∎ the drinks are on me/the house! c'est ma tournée/la tournée du patron!;∎ you can get it on the National Health ≃ c'est remboursé par la Sécurité sociale∎ to live on one's private income/a student grant vivre de ses rentes/d'une bourse d'études;∎ you can't live on such a low wage on ne peut pas vivre avec des revenus aussi modestes;∎ familiar they're on the dole or on unemployment benefit ils vivent du chômage ou des allocations de chômage□ ;∎ to retire on a pension of £5,000 a year prendre sa retraite avec une pension de 5000 livres par an∎ it works on electricity ça marche à l'électricité∎ they live on cereals ils se nourrissent de céréales;∎ we dined on oysters and champagne nous avons dîné d'huîtres et de champagne(e) (indicating drugs, medicine prescribed)∎ is she on the pill? est-ce qu'elle prend la pilule?;∎ I'm still on antibiotics je suis toujours sous antibiotiques;∎ the doctor put her on tranquillizers le médecin lui a prescrit des tranquillisants;∎ he's on insulin/heroin il prend de l'insuline/de l'héroïne;∎ he's on drugs il se drogue;∎ he'll deal with it on his return il s'en occupera à son retour;∎ looters will be shot on sight les pillards seront abattus sans sommation;∎ on the death of his mother à la mort de sa mère;∎ on my first/last visit lors de ma première/dernière visite;∎ on the count of three à trois∎ on hearing the news en apprenant la nouvelle;∎ on completing the test candidates should… quand ils auront fini l'examen les candidats devront…2 adverb∎ the lid wasn't on le couvercle n'était pas mis;∎ put the top back on afterwards remets le capuchon ensuite∎ why have you got your gloves on? pourquoi as-tu mis tes gants?;∎ the woman with the blue dress on la femme en robe bleue;∎ what had she got on? qu'est-ce qu'elle portait?, comment était-elle habillée?;∎ he's got nothing on il est nu∎ to read on continuer à lire;∎ the car drove on la voiture ne s'est pas arrêtée;∎ they walked on ils poursuivirent leur chemin;∎ from now or this moment or this time on désormais;∎ from that day on à partir ou dater de ce jour;∎ well on in years d'un âge avancé;∎ earlier/later/further on plus tôt/tard/loin;∎ on with the show! que le spectacle continue!∎ I've got a lot on this week je suis très occupé cette semaine;∎ have you got anything on tonight? tu fais quelque chose ce soir?(e) (functioning, running)∎ put or turn or switch the television on allume la télévision;∎ turn the tap on ouvre le robinet;∎ the lights had been left on les lumières étaient restées allumées;∎ the tap had been left on le robinet était resté ouvert;∎ the car had its headlights on les phares de la voiture étaient allumés∎ I have a bet on j'ai fait un pari∎ to be or go on about sth parler de qch sans arrêt□ ;∎ he's on about his new car again le voilà reparti sur sa nouvelle voiture;∎ what's she on about? qu'est-ce qu'elle raconte?;∎ he's always on about the war/teenagers il n'arrête pas de déblatérer sur la guerre/les adolescents;∎ my parents are always on at me about my hair mes parents n'arrêtent pas de m'embêter avec mes cheveux;∎ I've been on at them for months to get it fixed cela fait des mois que je suis sur leur dos pour qu'ils le fassent réparer(a) (working → electricity, light, radio, TV) allumé; (→ gas, tap) ouvert; (→ engine, machine) en marche; (→ handbrake) serré; (→ alarm) enclenché;∎ the radio was on very loud la radio hurlait;∎ make sure the switches are in the "on" position vérifiez que les interrupteurs sont sur (la position) "marche";∎ the "on" button le bouton de mise en marche(b) (happening, under way)∎ we're on in ten minutes c'est à nous dans dix minutes;∎ there's a conference on next week il y a une conférence la semaine prochaine;∎ the meeting is on right now la réunion est en train de se dérouler;∎ the match is still on (on TV) le match n'est pas terminé; (going ahead) le match n'a pas été annulé;∎ it's on at the local cinema ça passe au cinéma du quartier;∎ the play was on for weeks la pièce a tenu l'affiche pendant des semaines;∎ your favourite TV programme is on tonight il y a ton émission préférée à la télé ce soir;∎ there's nothing good on (on TV, radio) il n'y a rien de bien;∎ is the party still on? est-ce que la soirée se fait toujours?;∎ is our deal still on? est-ce que notre affaire tient toujours?;∎ the kettle's on for tea j'ai mis de l'eau à chauffer pour le thé;∎ hurry up, your dinner's on dépêche-toi, ton dîner va être prêt∎ I'm on at three o'clock, then off at nine o'clock je commence à trois heures et je finis à neuf heures∎ the odds are twenty to one on la cote est de vingt contre un∎ such behaviour just isn't on! une telle conduite est tout à fait inadmissible!□ ;∎ British it's not on! ça va pas du tout!∎ we'll never be ready by tomorrow, it just isn't on nous ne serons jamais prêts pour demain, c'est tout bonnement impossible∎ are you still on for dinner tonight? ça marche toujours pour le dîner de ce soir?;∎ shall we say £10? - you're on! disons 10 livres? - d'accord ou tope là!;∎ if you wash the dishes, I'll dry them - you're on! si tu fais la vaisselle, je l'essuie - ça marche!∎ to be on (menstruating) avoir ses ragnagnas∎ we went out together on and off for a year on a eu une relation irrégulière pendant un ansans arrêt;∎ he goes on and on about his minor ailments il nous rebat les oreilles avec ses petits problèmes de santé;∎ the play dragged on and on la pièce n'en finissait plus -
6 Edison, Thomas Alva
SUBJECT AREA: Architecture and building, Automotive engineering, Electricity, Electronics and information technology, Metallurgy, Photography, film and optics, Public utilities, Recording, Telecommunications[br]b. 11 February 1847 Milan, Ohio, USAd. 18 October 1931 Glenmont[br]American inventor and pioneer electrical developer.[br]He was the son of Samuel Edison, who was in the timber business. His schooling was delayed due to scarlet fever until 1855, when he was 8½ years old, but he was an avid reader. By the age of 14 he had a job as a newsboy on the railway from Port Huron to Detroit, a distance of sixty-three miles (101 km). He worked a fourteen-hour day with a stopover of five hours, which he spent in the Detroit Free Library. He also sold sweets on the train and, later, fruit and vegetables, and was soon making a profit of $20 a week. He then started two stores in Port Huron and used a spare freight car as a laboratory. He added a hand-printing press to produce 400 copies weekly of The Grand Trunk Herald, most of which he compiled and edited himself. He set himself to learn telegraphy from the station agent at Mount Clements, whose son he had saved from being run over by a freight car.At the age of 16 he became a telegraphist at Port Huron. In 1863 he became railway telegraphist at the busy Stratford Junction of the Grand Trunk Railroad, arranging a clock with a notched wheel to give the hourly signal which was to prove that he was awake and at his post! He left hurriedly after failing to hold a train which was nearly involved in a head-on collision. He usually worked the night shift, allowing himself time for experiments during the day. His first invention was an arrangement of two Morse registers so that a high-speed input could be decoded at a slower speed. Moving from place to place he held many positions as a telegraphist. In Boston he invented an automatic vote recorder for Congress and patented it, but the idea was rejected. This was the first of a total of 1180 patents that he was to take out during his lifetime. After six years he resigned from the Western Union Company to devote all his time to invention, his next idea being an improved ticker-tape machine for stockbrokers. He developed a duplex telegraphy system, but this was turned down by the Western Union Company. He then moved to New York.Edison found accommodation in the battery room of Law's Gold Reporting Company, sleeping in the cellar, and there his repair of a broken transmitter marked him as someone of special talents. His superior soon resigned, and he was promoted with a salary of $300 a month. Western Union paid him $40,000 for the sole rights on future improvements on the duplex telegraph, and he moved to Ward Street, Newark, New Jersey, where he employed a gathering of specialist engineers. Within a year, he married one of his employees, Mary Stilwell, when she was only 16: a daughter, Marion, was born in 1872, and two sons, Thomas and William, in 1876 and 1879, respectively.He continued to work on the automatic telegraph, a device to send out messages faster than they could be tapped out by hand: that is, over fifty words per minute or so. An earlier machine by Alexander Bain worked at up to 400 words per minute, but was not good over long distances. Edison agreed to work on improving this feature of Bain's machine for the Automatic Telegraph Company (ATC) for $40,000. He improved it to a working speed of 500 words per minute and ran a test between Washington and New York. Hoping to sell their equipment to the Post Office in Britain, ATC sent Edison to England in 1873 to negotiate. A 500-word message was to be sent from Liverpool to London every half-hour for six hours, followed by tests on 2,200 miles (3,540 km) of cable at Greenwich. Only confused results were obtained due to induction in the cable, which lay coiled in a water tank. Edison returned to New York, where he worked on his quadruplex telegraph system, tests of which proved a success between New York and Albany in December 1874. Unfortunately, simultaneous negotiation with Western Union and ATC resulted in a lawsuit.Alexander Graham Bell was granted a patent for a telephone in March 1876 while Edison was still working on the same idea. His improvements allowed the device to operate over a distance of hundreds of miles instead of only a few miles. Tests were carried out over the 106 miles (170 km) between New York and Philadelphia. Edison applied for a patent on the carbon-button transmitter in April 1877, Western Union agreeing to pay him $6,000 a year for the seventeen-year duration of the patent. In these years he was also working on the development of the electric lamp and on a duplicating machine which would make up to 3,000 copies from a stencil. In 1876–7 he moved from Newark to Menlo Park, twenty-four miles (39 km) from New York on the Pennsylvania Railway, near Elizabeth. He had bought a house there around which he built the premises that would become his "inventions factory". It was there that he began the use of his 200- page pocket notebooks, each of which lasted him about two weeks, so prolific were his ideas. When he died he left 3,400 of them filled with notes and sketches.Late in 1877 he applied for a patent for a phonograph which was granted on 19 February 1878, and by the end of the year he had formed a company to manufacture this totally new product. At the time, Edison saw the device primarily as a business aid rather than for entertainment, rather as a dictating machine. In August 1878 he was granted a British patent. In July 1878 he tried to measure the heat from the solar corona at a solar eclipse viewed from Rawlins, Wyoming, but his "tasimeter" was too sensitive.Probably his greatest achievement was "The Subdivision of the Electric Light" or the "glow bulb". He tried many materials for the filament before settling on carbon. He gave a demonstration of electric light by lighting up Menlo Park and inviting the public. Edison was, of course, faced with the problem of inventing and producing all the ancillaries which go to make up the electrical system of generation and distribution-meters, fuses, insulation, switches, cabling—even generators had to be designed and built; everything was new. He started a number of manufacturing companies to produce the various components needed.In 1881 he built the world's largest generator, which weighed 27 tons, to light 1,200 lamps at the Paris Exhibition. It was later moved to England to be used in the world's first central power station with steam engine drive at Holborn Viaduct, London. In September 1882 he started up his Pearl Street Generating Station in New York, which led to a worldwide increase in the application of electric power, particularly for lighting. At the same time as these developments, he built a 1,300yd (1,190m) electric railway at Menlo Park.On 9 August 1884 his wife died of typhoid. Using his telegraphic skills, he proposed to 19-year-old Mina Miller in Morse code while in the company of others on a train. He married her in February 1885 before buying a new house and estate at West Orange, New Jersey, building a new laboratory not far away in the Orange Valley.Edison used direct current which was limited to around 250 volts. Alternating current was largely developed by George Westinghouse and Nicola Tesla, using transformers to step up the current to a higher voltage for long-distance transmission. The use of AC gradually overtook the Edison DC system.In autumn 1888 he patented a form of cinephotography, the kinetoscope, obtaining film-stock from George Eastman. In 1893 he set up the first film studio, which was pivoted so as to catch the sun, with a hinged roof which could be raised. In 1894 kinetoscope parlours with "peep shows" were starting up in cities all over America. Competition came from the Latham Brothers with a screen-projection machine, which Edison answered with his "Vitascope", shown in New York in 1896. This showed pictures with accompanying sound, but there was some difficulty with synchronization. Edison also experimented with captions at this early date.In 1880 he filed a patent for a magnetic ore separator, the first of nearly sixty. He bought up deposits of low-grade iron ore which had been developed in the north of New Jersey. The process was a commercial success until the discovery of iron-rich ore in Minnesota rendered it uneconomic and uncompetitive. In 1898 cement rock was discovered in New Village, west of West Orange. Edison bought the land and started cement manufacture, using kilns twice the normal length and using half as much fuel to heat them as the normal type of kiln. In 1893 he met Henry Ford, who was building his second car, at an Edison convention. This started him on the development of a battery for an electric car on which he made over 9,000 experiments. In 1903 he sold his patent for wireless telegraphy "for a song" to Guglielmo Marconi.In 1910 Edison designed a prefabricated concrete house. In December 1914 fire destroyed three-quarters of the West Orange plant, but it was at once rebuilt, and with the threat of war Edison started to set up his own plants for making all the chemicals that he had previously been buying from Europe, such as carbolic acid, phenol, benzol, aniline dyes, etc. He was appointed President of the Navy Consulting Board, for whom, he said, he made some forty-five inventions, "but they were pigeonholed, every one of them". Thus did Edison find that the Navy did not take kindly to civilian interference.In 1927 he started the Edison Botanic Research Company, founded with similar investment from Ford and Firestone with the object of finding a substitute for overseas-produced rubber. In the first year he tested no fewer than 3,327 possible plants, in the second year, over 1,400, eventually developing a variety of Golden Rod which grew to 14 ft (4.3 m) in height. However, all this effort and money was wasted, due to the discovery of synthetic rubber.In October 1929 he was present at Henry Ford's opening of his Dearborn Museum to celebrate the fiftieth anniversary of the incandescent lamp, including a replica of the Menlo Park laboratory. He was awarded the Congressional Gold Medal and was elected to the American Academy of Sciences. He died in 1931 at his home, Glenmont; throughout the USA, lights were dimmed temporarily on the day of his funeral.[br]Principal Honours and DistinctionsMember of the American Academy of Sciences. Congressional Gold Medal.Further ReadingM.Josephson, 1951, Edison, Eyre \& Spottiswode.R.W.Clark, 1977, Edison, the Man who Made the Future, Macdonald \& Jane.IMcN
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