electromagnetic locking

- auxiliary locking
- call reception locking
- electric locking
- electromagnetic locking
- extended line locking
- general locking
- IF locking
- keyboard locking
- line locking
- mode locking
- set locking
- signal locking
- telephone station locking
- transmitter locking

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- ancillary sighting device
- anticrash device
- automatic retraction device
- automatic safety device
- backup device
- bending device
- bit rotation device
- blocking device
- borehole deviation device
- bottom unloading device
- bottomhole rotation device
- breakout device
- built-in diagnostic device
- casing-rotating device
- catching device
- cavitating jet kerfing device
- changeover device
- clean sweep device
- constant hydrostatic head device
- constant tension device
- contact device
- control device
- controlling device
- core interpreting device
- core receiver locking device
- damaged device
- defective device
- density device
- depth-measuring device
- derrick raising device
- desanding device
- deviation device
- diagnostic device
- disengaging device
- diverting device
- downhole device
- downhole surveying device
- drill string compensating device
- drilling device
- drilling bit feed device
- drilling mud device
- drilling mud agitating device
- drilling mud flow measuring device
- drilling pipe racking device
- drive-type split-tube soil-sampling device
- electrical logging device
- electrical resistivity logging device
- electrical survey device
- electromagnetic logging device
- epithermal neutron device
- external diagnostic device
- fail-active device
- fail-passive device
- failure-detection device
- failure-indicating device
- failure-sensing device
- fault-isolation device
- fault-locating device
- fixed stand-off device
- flaw-detecting device
- flow-control device
- flow-diverting device
- focused logging device
- four-arm device
- gamma-gamma logging device
- gamma-ray counting device
- gas-partitioning device
- go-no-go device
- gripping device
- guard device
- hoisting device
- hydraulic releasing device
- hydraulic retaining device
- hydraulically actuated retaining device
- induction logging device
- interlocking device
- jarring device
- kerfing device
- lateral device
- laterolog device
- laterologging device
- leveling device
- lifting device
- limiting device
- load safety device
- locating device
- locking device
- logging device
- long lateral device
- long normal device
- magnetic testing device
- make-and-break device
- marine loading device
- microfocused device
- microlaterolog device
- microlog device
- microresistivity device
- microspacing device
- microspherically focused logging device
- multiple-measurement device
- neutron device
- neutron-gamma device
- nondeteriorating device
- normal device
- normal logging device
- normal resistivity device
- nuclear logging device
- nuclear magnetic resonance device
- open-hole device
- overload-protection device
- pad device
- pad-mounted device
- personal protective device
- pipe collapsing device
- pipe hoisting device
- pipe makeup and breakout automatic device
- pipe stabber device
- pipeline tension device
- pit level device
- plugging device
- porosity-estimating device
- porosity-sensitive device
- pressure-sensing device
- pressure-sensitive device
- production control device
- protecting device
- protective device
- proximity log device
- ratcheting device
- rathole kelly guiding device
- ready-not-ready device
- redundancy device
- redundant device
- releasing device
- repairable device
- resistivity device
- resistivity logging device
- resistivity measuring device
- retaining device
- rod-handling device
- rotary power-torque device
- safety device
- safety alarm device
- sample-splitting device
- sampling device
- screw derrick raising device
- screw locking device
- scrolling device
- seafloor rocket coring device
- seismic detection device
- selective chargeover device
- self-healing device
- self-repair device
- sensing device
- sensing-switching device
- short lateral device
- short normal device
- shutdown device
- sidewall device
- sidewall coring device
- single receiver acoustic logging device
- skid device
- skimming device
- sound emitting device
- sound receiving device
- sounding device
- spherically focused logging device
- spooling device
- stand racking device
- stirring device
- stop device
- subsurface device
- sucker-rod hanging device
- surface-readout device
- tensioner device
- tensioning device
- testing device
- tripping device
- trouble-location device
- trouble-shooting device
- tubing suspension device
- two-electrode device
- underwater scour prevention device
- vacuum-hydraulic mixing device
- water locating device
- well-head pressure reducing automatic device
- well-logging device
- withdrawing device

- acoustic relay
- active-power relay
- add-and-subtract relay
- alarm relay
- Allström relay
- all-to-all relay
- annunciation relay
- antenna relay
- antiplugging relay
- armature relay
- auxiliary relay
- balanced relay
- baseband relay
- biased relay
- bistable relay
- blocking relay
- break-in relay
- calling relay
- capacitance relay
- center-stable polar relay
- clapper relay
- clearing relay
- close-differential relay
- closing relay
- coaxial relay
- code relay
- command relay
- compelled relay
- conductance relay
- connector relay
- contact relay
- contactless relay
- continuous duty relay
- control relay
- correed relay
- current relay
- dc relay
- definite-purpose relay
- delay relay
- diaphragm relay
- differential relay
- digital radio relay
- direct-action relay
- directional relay
- directional-current relay
- directional-overcurrent relay
- directional-polarity relay
- directional-power relay
- directional-resistance relay
- directional-voltage relay
- directivity relay
- distance relay
- dry-reed relay
- earth-fault relay
- electrical relay
- electrical-mechanical relay
- electromagnetic relay
- electromechanical relay
- electronic relay
- electronic-tube relay
- electrostatic relay
- electrostrictive relay
- enclosed relay
- extraterrestrial relay
- fast-operate relay
- fast-packet frame-relay
- fast-release relay
- fault selective relay
- ferrodynamicrelay
- field application relay
- field loss relay
- flat-type relay
- flow relay
- frequency relay
- frequency-selective relay
- frequency-sensitive relay
- gas-filled relay
- gas-filled reed relay
- general-purpose relay
- ground relay
- ground protective relay
- group-selector relay
- guard relay
- heavy-duty relay
- hermetically sealed relay
- high G-relay
- high-speed relay
- homing relay
- hot-wire relay
- impedance relay
- indicating relay
- indirect-action relay
- inertia relay
- initiating relay
- instantaneous overcurrent relay
- instrument-type relay
- integrating relay
- interlock relay
- intersatellite relay
- key relay
- Kipp relay
- lag relay
- latch-in relay
- latching relay
- LED-coupled solid-state relay
- light relay
- light-activated switching relay
- line relay
- line-break relay
- locking relay
- lockout relay
- lock-up relay
- logic relay
- magnetic reed relay
- magnetostrictive relay
- manual-automatic relay
- marginal relay
- mechanical locking relay
- memory relay
- mercury relay
- mercury-contact relay
- mercury-wetted reed relay
- metering relay
- meter-type relay
- mho relay
- microwave relay
- microwave-radio relay
- motor-field failure relay
- multiposition relay
- NC relay
- net-to-net relay
- network relay
- network master relay
- network phasing relay
- neutral relay
- NO relay
- nonpolarized relay
- normally-closed relay
- normally-open relay
- notching relay
- open relay
- open-phase relay
- oscillating relay
- overcurrent relay
- overfrequency relay
- overload relay
- overpower relay
- overvoltage relay
- percentage-differential relay
- phase-balance relay
- phase-reversal relay
- phase-rotation relay
- phase-sequence relay
- phase-shift relay
- photoelectric relay
- plunger relay
- polar relay
- polarized relay
- polyphase relay
- power relay
- pressure relay
- protective relay
- pulse reed relay
- radar relay
- radio relay
- ratchet relay
- rate-of-change relay
- rate-of-change temperature relay
- rate-of-rise relay
- ratio-balance relay
- ratio-differential relay
- reactance relay
- reactive-power relay
- reclosing relay
- reed relay
- register relay
- regulating relay
- remanent relay
- reset relay
- residual relay
- resistance relay
- resonant-reed relay
- reverse relay
- reverse-current relay
- ringing relay
- rotary stepping relay
- satellite relay
- selector relay
- self-latching relay
- semiconductor relay
- sensitive relay
- separating relay
- sequence relay
- sequential relay
- side-stable relay
- signal-actuated relay
- single-phase relay
- slave relay
- slow-acting relay
- slow-action relay
- slow-cutting relay
- slow-operate relay
- slow-release relay
- solenoid relay
- solid-state relay
- space relay
- speed-sensitive relay
- spring-actuated stepping relay
- SR relay
- stepping relay
- storage relay
- supersensitive relay
- surge relay
- synchronizing relay
- tape relay
- temperature relay
- test relay
- thermal relay
- thermostat relay
- three-position relay
- three-step relay
- time relay
- time-delay relay
- timing relay
- transformer-coupled solid-state relay
- transhorizon radio relay
- trip-free relay
- tripping relay
- trunk relay
- tuned relay
- two-position relay
- two-step relay
- undercurrent relay
- underfrequency relay
- underpower relay
- undervoltage relay
- vacuum reed relay
- valve relay
- vibrating relay
- voltage relay
- zero phase-sequence relay

- acoustic relay
- active-power relay
- add-and-subtract relay
- alarm relay
- Allström relay
- all-to-all relay
- annunciation relay
- antenna relay
- antiplugging relay
- armature relay
- auxiliary relay
- balanced relay
- baseband relay
- biased relay
- bistable relay
- blocking relay
- break-in relay
- calling relay
- capacitance relay
- center-stable polar relay
- clapper relay
- clearing relay
- close-differential relay
- closing relay
- coaxial relay
- code relay
- command relay
- compelled relay
- conductance relay
- connector relay
- contact relay
- contactless relay
- continuous duty relay
- control relay
- correed relay
- current relay
- dc relay
- definite-purpose relay
- delay relay
- diaphragm relay
- differential relay
- digital radio relay
- direct-action relay
- directional relay
- directional-current relay
- directional-overcurrent relay
- directional-polarity relay
- directional-power relay
- directional-resistance relay
- directional-voltage relay
- directivity relay
- distance relay
- dry-reed relay
- earth-fault relay
- electrical relay
- electrical-mechanical relay
- electromagnetic relay
- electromechanical relay
- electronic relay
- electronic-tube relay
- electrostatic relay
- electrostrictive relay
- enclosed relay
- extraterrestrial relay
- fast-operate relay
- fast-packet frame-relay
- fast-release relay
- fault selective relay
- ferrodynamic relay
- field application relay
- field loss relay
- flat-type relay
- flow relay
- frequency relay
- frequency-selective relay
- frequency-sensitive relay
- gas-filled reed relay
- gas-filled relay
- general-purpose relay
- ground protective relay
- ground relay
- group-selector relay
- guard relay
- heavy-duty relay
- hermetically sealed relay
- high G relay
- high-speed relay
- homing relay
- hot-wire relay
- impedance relay
- indicating relay
- indirect-action relay
- inertia relay
- initiating relay
- instantaneous overcurrent relay
- instrument-type relay
- integrating relay
- interlock relay
- intersatellite relay
- key relay
- Kipp relay
- lag relay
- latch-in relay
- latching relay
- LED-coupled solid-state relay
- light relay
- light-activated switching relay
- line relay
- line-break relay
- locking relay
- lockout relay
- lock-up relay
- logic relay
- magnetic reed relay
- magnetostrictive relay
- manual-automatic relay
- marginal relay
- mechanical locking relay
- memory relay
- mercury relay
- mercury-contact relay
- mercury-wetted reed relay
- metering relay
- meter-type relay
- mho relay
- microwave relay
- microwave-radio relay
- motor-field failure relay
- multiposition relay
- NC relay
- net-to-net relay
- network master relay
- network phasing relay
- network relay
- neutral relay
- NO relay
- nonpolarized relay
- normally-closed relay
- normally-open relay
- notching relay
- open relay
- open-phase relay
- oscillating relay
- overcurrent relay
- overfrequency relay
- overload relay
- overpower relay
- overvoltage relay
- percentage-differential relay
- phase-balance relay
- phase-reversal relay
- phase-rotation relay
- phase-sequence relay
- phase-shift relay
- photoelectric relay
- plunger relay
- polar relay
- polarized relay
- polyphase relay
- power relay
- pressure relay
- protective relay
- pulse reed relay
- radar relay
- radio relay
- ratchet relay
- rate-of-change relay
- rate-of-change temperature relay
- rate-of-rise relay
- ratio-balance relay
- ratio-differential relay
- reactance relay
- reactive-power relay
- reclosing relay
- reed relay
- register relay
- regulating relay
- remanent relay
- reset relay
- residual relay
- resistance relay
- resonant-reed relay
- reverse relay
- reverse-current relay
- ringing relay
- rotary stepping relay
- satellite relay
- selector relay
- self-latching relay
- semiconductor relay
- sensitive relay
- separating relay
- sequence relay
- sequential relay
- side-stable relay
- signal-actuated relay
- single-phase relay
- slave relay
- slow-acting relay
- slow-action relay
- slow-cutting relay
- slow-operate relay
- slow-release relay
- solenoid relay
- solid-state relay
- space relay
- speed-sensitive relay
- spring-actuated stepping relay
- SR relay
- stepping relay
- storage relay
- supersensitive relay
- surge relay
- synchronizing relay
- tape relay
- temperature relay
- test relay
- thermal relay
- thermostat relay
- three-position relay
- three-step relay
- time relay
- time-delay relay
- timing relay
- transformer-coupled solid-state relay
- transhorizon radio relay
- trip-free relay
- tripping relay
- trunk relay
- tuned relay
- two-position relay
- two-step relay
- undercurrent relay
- underfrequency relay
- underpower relay
- undervoltage relay
- vacuum reed relay
- valve relay
- vibrating relay
- voltage relay
- zero phase-sequence relay

- gear change hand lever - gear change shift fork - gear changing - gear changing by foot - gear clearance - gear guard - gear into - gear lift - gear nobbing machine - gear hub - gear lapping machine - gear lever - gear lever interlock - gear lever lock - gear lock - gear measuring machine - gear milling machine - gear noise - gear oil pump - gear operating shaft - gear parts - gear pinion - gear puller - gear pump - gear quadrant - gear rack - gear range - gear ratio - gear reduction - gear reduction rate - gear reduction unit - gear rim - gear ring - gear scoring - gear set - gear set case - gear shaft - gear shaping - gear shaping machine - gear shaving machine - gear shift - gear shift bar - gear shift bar selector - gear shift gate - gear shift lever - gear shift mechanism - gear shift tower - gear shifter - gear shifter shaft lock - gear shifter shaft lock ball - gear shifter shaft lock plunger - gear shifter shaft lock spring - gear shifting - gear shifting diagram - gear shifting fork - gear shifting gate - gear shifting lever - gear shifting quadrant - gear side movement - gear teeth - gear teeth lapping machine - gear tester - gear testing machine - gear tooth contact - gear tooth depth gauge - gear tooth vernier caliper - gear train - gear up - gear wheel - gear with tooth correction - gear withdrawer - in gear - lock in gear - out of gear - put into gear - throw into gear - throw out of gear - cone friction gear - coupling gear - crane travelling gear - cut gear - cycloidal gear - discriminating gear - double wheel gear - draw-off gear - elliptical gear - elliptical gear-wheel - encased gear - encased back gear - face gear - feed gear - friction draft gear - friction draught gear - globoidal worm gear - grip gear - ground gear - hand gear - hand steering gear - helical gear - herring-bone gear - high gear - high-ratio gear - Hindley worm gear - hoisting gear - hour-glass worm gear - hydraulic gear - hyperbolical gear - hyperboloidal gear - hypoid gear - idle gear - idler gear - idler reverse gear - index gear - indicator gear - increase gear - interchangeable gears - interlocking gear - intermediate gear - intermittent gear - internal gear - internal spur gear - involute gear - irreversible gear - knocking gear - knuckle gear - lantern gear - lever barring gear - lifting gear - link gear - lock gear - locking gear - longitudinal feed gear - low gear - lubricating gear - lufting gear - magnetic gear - main gear - mangle gear - master gear - metric gear - mid gear - middle gear - module gear - mitre gear - multiplying gear - mutual interlocking gear - non-circular spur gear - octoid bevel gear - oil gear - oil splash gear - oleo gear - operating gear - oscillating cam gear - parallelogram valve gear - pedal gear - pick-off gear - pin gear - pinion gear - pin-wheel gear - piston valve gear - planet gear - planetary gear - point gear - poppet valve gear - positive valve gear - power gear - propeller gear - pulley gear - quick-change gear - quiet gear - quill gear - rack-and-pinion gear - rack feed gear - ratchet gear - readjusting gear - recording gear - reducing gear - reduction gear - reference gear - reference gear-wheel - release gear - remote-control gear - reverse gear - reversing gear - ring gear - rod gear - rotation gear - running gear - saddle gear - safety gear - safety gripping gear - sanding gear - satellite gear - screw gear - scroll gear - segment gear - segmental gear - selective gear - selector gear - self-changing gear - self-locking gear - self-stopping gear - single-curve gear - skew gear - skew bevel gear - slew gear - slewing gear - sliding gear - slip gear - speed-change gear - speed-increasing gear - spiral gear - spiral bevel gear - split gear - spool gear - sprocket gear - spur gear - starting gear - stop gear - straight bevel gear - striking gear - sun gear - sun-and-planet gear - supplementary gear box - swivel gear - synchronizing gear - tappet gear - three-axle gear - throw-over gear - thrust gear - timing gear - tipping gear - tooth gear - towing gear - trailer gear - transmission gear - traverse gear - traversing gear - trigger gear - trip gear - triple-change gear - triple helical gear - tripping gear - tumbler gear - tumbling gear - turning gear - twisted gear - two-speed gear - uncoupling gear - V-gear - valve gear - variable-speed gear - wedge friction gear - wheel gear - whipping gear - winding gear - worm gear - worm barring gear