micro-section

- acoustic alarm system
- acoustic image system
- acoustic systems
- actiontrack system
- active IR-system
- actuator system
- adaptive communication system
- adaptive teleinformation system
- adaptive telemetering system
- advanced information system
- Afsatcom system
- air system
- aircraft intercommunication system
- airfield communication system
- air-ground automatic system
- airline reservation system
- air-to-ground TV system
- alarm signal system
- alarm system
- all-channel signaling system
- ALL-IN-ONE system
- alphanumeric system
- amplified speaker system
- amplitude shift-keying system
- AMPS system
- analog cellular communication system
- analog cellular system
- analog component video system
- analog television system
- analog tropospheric system
- anisochronous system
- antenna system
- antitheft system
- AR system
- Arabsat system
- ASK system
- associated channel analog system
- asynchronous address communication system
- audio recording system
- Aurora system
- Aussat system
- automatic communication system
- automatic connection establishment system
- automatic control system
- automatic data acquisition system
- automatic telegraphy system
- automatic telephone system
- automatic tuning system
- automatized cellular system
- auxiliary alarm system
- balanced cable transmission system
- band sharing system
- base station system
- baseband system
- basic input/output system
- bass-reflex speaker system
- batch processing system
- batch transmission system
- batch-and-forward system
- batteryless system
- bilateral CTV system
- binary tariff system
- biocontrol system
- bit parallel interface system
- bit transport system
- bridge duplex system
- broadband mobile system
- broadcast satellite system
- broadcasting delivery media systems
- burglar alarm system
- byte-serial interface system
- cabinet system
- cabinetless system
- cable distribution system
- cable TV system
- call-accounting system
- call-answering system
- call-counting system
- call-distributing system
- call-processing system
- call-queueing system
- camp-on system
- CAPTAIN system
- car component audio system
- carrier reinsertion system
- carrier system
- carrier-communication system
- carrier-current communication system
- Cassegrain-Schmidt system
- cassette recording system
- cassette reproducing system
- CATRIN system
- caution system
- CD 900 system
- cellular system
- cellular-radio system
- central-battery system
- centralized control system
- chirp binary telegraph system
- cipher system
- circuit switched telecommunication system
- circuit switching telecommunication system
- circular telecontrol system
- clock system
- closed-circuit communication system
- closed-circuit telegraph system
- closed-numbering system
- code-dependent system
- code-division multiple access system
- code-independent system
- code-insensitive system
- code-sensitive system
- coding system
- coherent fiber-optic system
- collimating system
- collocated system
- color separating system
- combined numbering system
- combined power supply system
- combined satellite communication system
- common-battery system
- common-carrier system
- common-channel signaling system
- common-engineering communication system
- common-purpose cellular system
- common-using band system
- common-using cordless telephone system
- common-using paging system
- communication system
- communication traffic system
- communications system
- community antenna system
- community antenna television system
- community TV-system
- commununication switching system
- compact disk digital audio system
- compatible color television system
- compatible single sideband system
- compatible single-band system
- compatible TV-system
- complex radio communication system
- computer vision system
- computer-telephone system
- Comsar system
- Comsat system
- Conax system
- concentrated-insonation system
- conference system
- conference-communication system
- congested system
- congress-class system
- constant-current system
- control generating system
- conventional television system
- Conversant system
- cordless-communication system
- crossbar system
- crossed-coincident microphone system
- Crosspoint system
- CSE system
- C-system
- cubical video projecting system
- data processing system
- data system
- data transport system
- data-collection system
- data-compression system
- data-exchange system
- dataflow system
- data-gathering system
- data-handling system
- data-measuring system
- data-reduction system
- data-transmission system
- Decca Navigator system
- DECfax system
- decision-feedback system
- dedicated control channel system
- dedicated multimedia system
- delta-sigma system
- deluxe presentation system
- departmental communication system
- desktop-video system
- DFS/Copernicus system
- dial-telephone system
- differential phase shift-keying system
- differential-duplex system
- differential-magnetic system
- digital camera system
- digital hybrid-key telephone system
- digital mass storage system
- digital microwave radio transmission system
- digital telephone communication system
- digital transmission system
- digital TV-communication system
- Digital UNIX system
- digital-analog system
- digital-cellular system
- digital-data modulation system
- digital-effect system
- digital-message entry system
- digital-termination system
- direct-broadcasting satellite system
- directing system
- direct-modulation system
- direct-sequence system
- direct-telephone communication system
- discrete communication system
- discrete sound system
- discrete-addressing system
- disk-operating system
- DISOSS system
- dispatch telephone communication system
- dispatch-center system
- dispersed-insonation system
- distributed-insonation system
- distributed-processing system
- documental-type communication system
- Dolby systems
- domestic satellite communication system
- double-band telephone communication system
- double-channel transmission system
- double-current transmission system
- double-pole communication system
- double-sideband large carrier system
- DSCS system
- D-system
- dual-cable system
- dual-reflector system
- duplexed system
- Earth-to-space transmission system
- ECM system
- electric communication system
- electronic antishock system
- electronic data-gathering system
- electronic data-processing system
- electronic-message system
- electronic-scanning system
- electronic-switching system
- Ellipso system
- emergency telephone communication system
- emergency-broadcast system
- EMX system
- equidistant system
- error-correction system
- error-detection system
- Eutelsat system
- extensible system
- external paging system
- facsimile system
- fast-acting servicing system
- fault-tolerant system
- fax communication system
- fax transmitting system
- feed system
- fiber transmission system
- fiber-optic transmission system
- field-sequential system
- final mile system
- finishing system
- fire alarm system
- fire warning system
- first generation cellular system
- five-channel communication system
- fixed satellite system
- Flexcam system
- flexible access system
- Flitsatcom system
- focusing system
- four-channel sound system
- four-dimensional system
- four-wire telephone communication system
- frame-sequential system
- frequency shift-keying system
- frequency-carrier system
- frequency-control system
- front-bass reflex speaker system
- fully digital system
- gate system
- Gaussian system
- generalized system
- generating dynamic system
- generator-dc-motor system
- GIGASET radio system
- global positioning system
- Global system
- Gopher system
- grandfathered system
- group-alerting and dispatching system
- guide system
- hard-wired CCTV system
- hazard system
- helical-scan system
- HF-synchronizing system
- high-precision navigating system
- Hi-linear system
- home system
- home-telephone system
- home-type system
- homing-guidance system
- host system
- hydroacoustic system
- ideal communication system
- idealized system
- image informaion system
- image-forming system
- immedial servicing system
- incompatible system
- independent system
- information retrieval system
- information system radio system
- information system
- information-feedback system
- information-measuring system
- infrared alarm system
- Inmarsat system
- Inmarsat-A system
- Inmarsat-B system
- Inmarsat-C system
- Inmarsat-D system
- Inmarsat-M system
- Inmarsat-P system
- integrated telephone system
- integrated videographic teleconferencing system
- integrated-antenna system
- integrated-communication system
- integrated-modulation system
- integrated-office system
- Intelsat system
- interactive system
- intercarrier-sound system
- intercommunication system
- intercontinental tropospheric system
- interlock system
- intermachine exchange system
- intermediate system
- international communication system
- interphone system
- Intervision system
- intraband signaling system
- intruder alarm system
- inward-outward dialing system
- ionoscatter system
- ionosphere sounder system
- ionospheric system
- Iridium system
- isolated system
- Italsat system
- J-carrier system
- joint-multichannel trunking and switching system
- K-carrier system
- key system
- key-telephone system
- land satellite communication system
- large-grained communication system
- laser communication system
- L-band satellite system
- L-carrier system
- Leasat system
- lightning protection system
- limited distortion system
- line amplifiers system
- link system
- little-channel relay system
- local alarm system
- local battery system
- local communication system
- local radio paging system
- long-haul system
- long-range system
- loop system
- loud-speaking communication system
- low-traffic system
- magnetic tape recording system
- Mail system
- management-information system
- manual cellular system system
- manual telephone set system
- Marisat system
- master television system
- master-antenna television system
- matrix sound system
- message feedback system
- message procession system
- message registration system
- message-switched system
- meteor radio system
- Metrobus system
- micro component system
- Micro Press Cluster Printing system
- micro-lens system
- microprocessor system
- microwave relay system
- midi system
- mine radio telephone system
- mini system
- mixed media system
- mixed numbering system
- mobile cellular communication system
- mobile land communication system
- mobile radio system
- mobile relay system
- mobile system
- modulated system
- monetary mobile system
- MS-Mail system
- multiareal system
- multicassette system
- multichannel telephone system
- multicomputer system
- multidisk system
- multiformat recording system
- multifrequency tone signaling system
- multiguard system
- multilevel mixed system
- multimedia system
- multiple-channel system
- multiqueue system
- Multiscrypt system
- multistandard system
- multitrack editing system
- mutibeam antenna system
- muting system
- Nagravision system
- NAMTS system
- narrow-angle TV system
- national communication system
- navigation system
- n-channel communication system
- n-channel DPSK system
- n-channel transmission system
- network standalone system
- network system
- network-operation system
- networks numbering system
- neutral direct-current telegraph system
- n-head video system
- NMT system
- noise-reduction system
- nonhoming tuning system
- noninterlaced television system
- nonsegmented system
- Norsat system
- n-satellite system system
- n-tone DPSK system
- n-tone MFSK system
- NTSC system
- NTT system
- obligatory message system
- Odyssey system
- off-line system
- on-line computer system
- on-line secured system
- open numbering system
- open system
- operative-engineering communication system
- opposite signals system
- optical-communication system
- optical-information system
- optical-projection system
- optoelectronic system
- oscillating system
- oscillation system
- outband signaling system
- package-and-resource tracking system
- pagemaster system
- paging system
- PAL system
- parametric system
- PATHWORKS system
- pattern recognition system
- personal holding guard system
- phase shift-keying system
- phone system
- Piccolo system
- pilot-controller system
- polar direct-current telegraph system
- portable mobile system
- power control system
- power controlling system
- power-line carrier system
- power-supply system
- press-to-talk system
- Prestel system
- primary-supply system
- privacy system
- private branch paging system
- private movable system
- private videodata system
- private videotex system
- process-interface system
- PROFS system
- programmable cross-connect system
- programmable cross-connected system
- programmed radio system
- prompting system
- protected wireline distribution system
- protection system
- pseudoquadraphony system
- pseudotrunking system
- public videodata system
- public videotex system
- pulse-code system
- pulse-frequency system
- pulse-time system
- quadraphonic sound system
- quadruple-diversity system
- R1 system
- R2 system
- radio buoy system
- radio command system
- radio communication system
- Radio Data system
- radio facsimile system
- Radiocom 2000 system
- radio-control system
- radio-paging system
- radio-relay system
- radiosonde-radio-wind system
- radio-telemetering system
- real time pulse-echo system
- real time system
- receiver lockout system
- recording system
- recovery system
- redundant system
- reference-information system
- regional electronic payment system
- relay-radio system
- remote concentrating system
- remote control system
- remote diagnostic system
- remote information system
- remote semiconcentrating system
- remote sensing system
- remote signaling system
- rendering system
- rerecording system
- reserved servicing system
- RF/Transmission system
- rotary system
- safety alarm system
- safety system
- Satcom system
- satellite comminication system
- satellite marine comminication system
- Satellite Master Antenna Television system
- satellite radio system
- satellite-aircraft communication system
- SB-communication system
- SBL communication system
- scalable system
- scanning trunking system
- SCO UNIX system
- searchless identification system
- seat reservation system
- SECAM system
- second generation cellular system
- second room system
- secondary supply system
- secrecy system
- section communication system
- security system
- segmented system
- seismic system
- selective calling system
- selective frequency base station system
- selective protective system
- selective telephone system
- self-adjusting system
- self-balancing differential system
- self-contained system
- self-test system
- selsyn system
- semiautomatic-switching system
- semiautomatized cellular system
- sensory system
- servo system
- shadow-batch system
- short-haul microwave system
- Sicral system
- Sigma Servo system
- signal system
- simplex movable system
- single-band transmission system
- single-busbar system
- single-cable communication system
- single-cable system
- single-channel system
- single-current transmission system
- single-pulse tracking system
- Skynet system
- small-grained communication system
- SmarTrunk II radio communication system
- solid-state uninterruptible power battery system
- Sony bus system
- sound alarm system
- sound equalization system
- sound navigation system
- sound reinforcement system
- sound warning system
- space-division system
- space-switched system
- spark-safe system
- speaker system
- special communication system
- speech-processing system
- speech-recognition system
- split-speaker system
- spread-spectrum system
- stabilizing system
- stage monitoring system
- standalone double point system
- star-circuit system
- STAREX CMX system
- starting communication system
- start-stop system
- stationary satellite system
- step-by-step system
- stereo sound system
- stereophonic sound system
- storage system
- storage-and-retrieval system
- Strowger system
- submarine fiber-optic system
- subprimary digital transmission system
- subscriber carrier system
- subscriber switching system
- suffix system
- Supersat system
- supervisory control system
- surround sound system
- switched telecommunication system
- switching system
- sync communication system
- synchro system
- synchronous communication system
- synchronous digital system
- TAGS system
- tandem system
- tariffication system
- T-carrier system
- TDF system
- teleautomatic system
- Telecom system
- telecommunication system
- telecommunications system
- telecommunication-service priority system
- telecommunications-service priority system
- telecontrol system
- telemechanic system
- telemetering system
- telemetry system
- telephone system
- telephone-answering system
- telephone-communication system
- telephone-communications system
- teleprocessing system
- Telesat system
- teletex system
- teletypewriter system
- television-telephone system
- Tele-X system
- Telsar system
- terminal system
- terrestrial radio-relay system
- theft-prevention system
- thin-route system
- third generation communication system
- three-axle stabilizing system
- three-channel HF-telephone system
- three-channel transmission system
- three-color system
- three-lens optical system
- three-primary system
- three-wire system
- time-dissemination system
- time-frequency hopping system
- time-switched system
- total access communication system
- total area coverage system
- transmission system
- trichromatic system
- triple-interlace system
- triplex system
- trunk communication system
- TV-observation system
- twelve-channel transmission system
- two-arm system
- two-band system
- two-color system
- two-roller transfer system
- two-step control system
- two-way CATV system
- two-way system
- two-wire telephone communication system
- ultra-match system
- ULTRIX system
- unified radioaccess system
- unilateral-control system
- unilateral-synchronization system
- uninterruptible-power system
- Unisat system
- universal alarm system
- universal-battery system
- universal-electronic system
- universal-movable system
- Uniworks system
- vestigial-sideband system
- video editing system
- video home system
- video recording system
- videocom system
- videoteleconference system
- videotex system
- virtual studio system
- vision system
- vocoder system
- voice dialog system
- voice frequency carrier telegraph system
- voice modulation system
- voice post system
- volume control system
- waiting system
- warning system
- watch system
- watching system
- waterside facsimile communication system
- wave-propagating system
- wide-angle TV system
- Winfax Pro system
- wired broadcasting system
- wireless CCTV system
- wireless home system
- wireless infrared speaker system
- wire-radio communication system
- XY system
- zone-selective protection system
- zoning system

2) биофильтр
3) выцедить
4) выцеживать
5) отцеживать
6) фильтровальный
7) фильтровый
8) цедилка
9) цедило
10) < radio> промежуточный
11) фильтровать
12) отфильтровывать
13) просачиваться
14) профильтровать
15) фильтростроение
16) фильтрующий
– absorbent filter
– absorption filter
– acoustic filter
– active filter
– air filter
– all-ass filter
– all-pass filter
– all-pole filter
– antismoke filter
– ashless filter
– bacteriological filter
– bag filter
– baghouse filter
– band filter
– band of filter
– band-elimination filter
– band-exclusion filter
– band-pass filter
– band-splitting filter
– bandpass filter
– batch-type filter
– biological filter
– brute-force filter
– butters filter
– camera filter
– candle filter
– capacitance-resistance filter
– cartridge filter
– channel filter
– charcoal filter
– choke filter
– coarse filter
– comb filter
– compensating filter
– constant-K filter
– crystal filter
– deironing filter
– depth filter
– digital filter
– directional filter
– discrete filter
– discrimination of a filter
– disk filter
– dust filter
– edge filter
– equal-element filter
– fabric filter
– feedback filter
– felt filter
– filter board
– filter cake
– filter cell
– filter center
– filter choke
– filter clogging
– filter cup
– filter discrimination
– filter element
– filter factor
– filter hut
– filter media
– filter medium
– filter out
– filter pad
– filter paper
– filter passband
– filter sand
– filter section
– filter sludging
– filter sterilization
– filter stock
– filter tip
– filter vat
– fine filter
– folded filter
– fuel filter
– full-flow oil filter
– gasoline filter
– gravel filter
– gravity filter
– harmonic filter
– heat filter
– high-pass filter
– hole filter
– inertialess filter
– interference filter
– inverse-response filter
– iterative filter
– kieselguhr filter
– ladder-type filter
– leaf filter
– light filter
– line filter
– LO filter
– lossless filter
– low-pass filter
– Lyot-Ohman filter
– m-derived filter
– match filter
– matched filter
– membrane filter
– micro-wave filter
– monochromatic filter
– narrow-band filter
– needle filter
– neutral filter
– noise filter
– optical filter
– optimum filter
– output filter
– parametric filter
– percolating filter
– pipe filter
– polarizing filter
– polishing filter
– powder filter
– precoat filter
– predicting filter
– pressure filter
– pressure-type filter
– projector filter
– quarter-wave filter
– quartz filter
– quasi-optical filter
– radio-interference filter
– reciprocal filter
– rejection filter
– resonator filter
– ripple filter
– sand filter
– screen filter
– selective filter
– self-cleaning filter
– separation filter
– sewerage filter
– single-mess filter
– sponge filter
– stripline filter
– subtractive filter
– suction filter
– supply-line filter
– suppression filter
– surface-wave filter
– total filter
– tunable filter
– tuneable filter
– tuned filter
– two-section filter
– velocity filter
– wave filter
– waveguide filter
– wide-band filter

attenuation band of filter — полоса заграждения фильтра

band vacuum filter — ленточный вакуум - фильтр

channel band-pass filter — индивидуальный полосовой фильтр

choke output filter — дроссельный фильтр

color correcting filter — цветокорректирующий светофильтр

color separation filter — цветоделительный светофильтр

electrical wave filter — электрический фильтр

filter attenuation band — <tech.> зона непрозрачности

filter transmission band — <tech.> зона прозрачности

high-rate trickling filter — скорый фильтр

infinite memory filter — фильтр с бесконечной памятью

leaf vacuum filter — рамный вакуум-фильтр

linear continuous filter — <electr.> фильтр непрерывный линейный

low-pass iterative filter — фильтр цепной нижних частот

low-rate trickling filter — медленный фильтр

mode selection filter — фильтр типов колебаний

optimum detecting filter — оптимальный фильтр

piezoelectric ceramic filter — пьезокерамический фильтр

plate vacuum filter — тарельчатый вакуум-фильтр

rate of cut-off of a filter — крутизна отсечки фильтра

scalp cake off filter — срезать пирог с фильтра

sharp cut-off filter — фильтр с крутым срезом

single pole filter — однозвенный фильтр

solid circuit filter — твердотельный фильтр

swing filter out of beam — выводить светофильтр из пути луча

transmission band of filter — полоса прозрачности фильтра

- Armco pile - bag pile - Balken pile - batter pile - battered pile - bearing pile - blunt pile - bored pile - bored cast-in-place pile - bored and cast-in-place pile - boring pile - bound pile - box pile - built pile - bulb pile - buoyancy pile - caisson pile - capped pile - cased pile - cast-in-situ concrete pile - cement pile - cementation pile - closed-end pipe pile - closing pile - Cobi pile - column pile - compaction pile - composite pile - compression pile - concrete pile - concrete cast-in-place pile - concrete shell pile - consolidating piles - contiguous bored pile - cool pile - cooling pile - cylindrical pile - delta pile - disk pile - drilled pile - driven pile - encased pile - encased sheet pile - end-bearing pile - fender pile - filling pile - fixed-end pile - floating pile - fluted tapered-shell pile - foundation pile - foundation pile of grating - Franki pile - Franki-Miga pile - free-end pile - friction pile - Frodinham steel pile - Fundex pile - gang pile - grooved pile - guide pile - H-beam pile - hinged pile - hollow pile - hollow-shell pile - hooped pile - H-section pile - I-beam pile - inclined pile - jack pile - jetted pile - junction pile - king pile - leading pile - lime pile - male pile - moulded-in-place pile - overdriven pile - pedestal pile - pipe pile - plank pile - plumb pile - point-bearing pile - pointed pile - precast pile - precast-concrete pile - prefabricated pile - raking pile - Raymond pile - Raymond step-taper pile - reinforced concrete pile - reinforced precast-concrete pile - Rotinoff pile - sand pile - scrap pile - screw pile - screwcrete pile - secant pile - sectional pile - sectional steel pile - sheet pile - sheet pile on frame - shell pile - shelled concrete pile - Simplex pile - soil pile - solid pile - spliced pile - spoil pile - standby pile - standing pile - stay pile - steel pile - steel sheet pile - step-taper pile - stock pile - tension pile - test pile - timber pile - tubular pile - uncased pile - untapered pile - uplift pile - vibro pile - wood pile - working pile - piles of concrete
- add-on pile
- alpha pile
- anchor pile
- Armco pile
- augered pile
- auger pile
- bag pile
- Balken pile
- battered pile
- batter pile
- bearing pile
- belled-out pile
- bored pile
- bored pile with expanded base
- bored and cast-in-place pile
- box pile
- British Steel Piling Co's cased pile
- BSP vibro pile
- buoyancy pile
- caisson pile
- cased pile
- cast-in-place displacement pile
- cast-in-situ pile
- cemcore auger-injected pile
- closed-end pipe pile
- Cobi pile
- compaction pile
- composite pile
- compressed pile
- compression pile
- concore auger-injected pile
- concrete pile
- concrete-filled steel pipe pile
- contiguous bored pile
- creosoted pile
- deflected pile
- delta pile
- displaced pile
- displacement pile
- Dowsett Prepakt pile
- Dowsett pile
- drilled pile
- driven pile
- driven cast-in-place pile
- driven shell pile
- driven underpinning pile
- encased sheet pile
- end-bearing pile
- enlarged pile
- female pile
- fender pile
- fixed-end pile
- floating pile
- Fondedile pile
- Franki pile
- Franki cased-pedestal pile
- Franki-Miga pile
- Franki uncased-pedestal pile
- free-end pile
- friction pile
- Frodingham box pile
- Frodingham double box pile
- Frodingham plated box pile
- Frodingham steel pile
- Fuentes pile
- Fundex pile
- Gambia pile
- gauge pile
- GKN driven pile
- guide pile
- H-beam pile
- H pile
- heaved pile
- Hercules pile
- Hochstrasser-Weise pile
- hollow pile
- hollow concrete tube pile
- hollow shell pile
- holmpress pile
- I pile
- inclined pile
- in-situ pile
- interlocking pile
- jacked pile
- jack pile
- jetted pile
- jointed pile
- king pile
- large-diameter bored pile
- large-diameter pile
- Larsen box pile
- lime pile
- MacArthur pile
- male pile
- micro pile
- Miga pile
- mini pile
- monotube pile
- mooring pile
- nondisplacement pile
- open-end pipe pile
- Pali Radice pile
- palm pile
- pedestal pile
- pipe pile
- pipe step taper pile
- point-bearing pile
- polypropylene reinforced pile
- precast reinforced-concrete pile
- precast pile
- precast sectional pile
- prefabricated pile
- preformed pile
- preliminary pile
- pressure pile
- Prestcore pile
- prestressed concrete pile
- prestressed pile
- pretest pile
- raker pile
- Raymond pile
- Raymond cylinder pile
- Raymond regulated injection pile
- Raymond standard taper pile
- Raymond step-taper pile
- rectangular hollow core r.c. pile
- Rendhex steel pile
- risen pile
- rock pile
- root pile
- rotary bored cast-in-place pile
- Rotinoff pile
- sand pile
- screw pile
- seamless pipe pile
- secant pile
- sectional pile
- segmental pile
- sheet pile
- shell pile
- Simplex pile
- single pile
- slender pile
- small-diameter pile
- soil pile
- soldier pile
- spiral weld pipe pile
- stay pile
- steel pile
- steel box pile
- steel tube pile
- step-taper pile
- stock pile
- tapered pile
- tapered fluted pile
- tension pile
- test pile
- timber pile
- treated pile
- tubex pile
- tubular precast r.c. pile
- uncased pile
- underpinning pile
- under-reamed pile
- Union pile
- uplift pile
- vertical-sided pile
- vibrated shaft Franki pile
- vibro pile
- Wakefield sheet pile
- welded steel pipe pile
- Western pile
- West pile
- Western button-bottom pile
- Western cased pile
- Western pedestal pile
- Western uncased pile
- West's hardwire pile
- West's shell pile
- wing pile
- wood pile
- wood-step taper pile
- working pile
- Z pile