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1 drill a pilot hole
- drill a pilot hole
- n/vi/ сверлить базовое отверстие
Англо-русский строительный словарь. Академик.ру. 2011.
Англо-русский словарь строительных терминов > drill a pilot hole
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2 drill a pilot hole
Строительство: сверлить базовое отверстие -
3 pilot hole drill
Глоссарий компании Сахалин Энерджи: сверло для направляющих отверстий -
4 pilot hole drill
Англо-русский словарь нефтегазовой промышленности > pilot hole drill
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5 pilot hole drill
Англо-русский словарь по проекту Сахалин II > pilot hole drill
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6 pilot hole drill
English-Russian dictionary of Oil Industry > pilot hole drill
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7 drill
1. n тех. сверло2. n тех. бур; бурав3. n тех. дрель; коловорот4. n тех. зоол. брюхоногий моллюск5. v сверлить, высверливать, просверливать6. v бурить7. v спорт. придавать вращательное движение8. n упражнения; тренировкаto know the drill — знать свой урок; знать, что надо делать
9. n разг. тренер10. n разг. строевик11. v упражнять, тренировать; натаскивать; обучатьto drill a dog to do smth. — натаскивать собаку
12. v упражняться; тренироваться13. v воен. обучать строю; муштровать14. v воен. заниматься строевой подготовкой; проходить строевое обучение15. n с.-х. сеялка16. n с.-х. рядовой сев17. n с.-х. борозда18. v с.-х. сеять, производить рядовой посев19. n зоол. мандрил20. n текст. тикСинонимический ряд:1. boring tool (noun) auger; bit; bore; boring tool; countersink; gimlet; steel drill; tap-bore; trepan; wood bit2. formation (noun) formation; maneuver; parade3. machine for planting seeds (noun) dibble; drill seeder; farm tool; implement; machine for planting seeds; planter; seeder4. military training (noun) close-order drill; conditioning; drop training; guerilla training; maneuvers; military training; open-order drill; paratroop training; survival training5. practice (noun) drilling; exercise; learning by doing; practice; preparation; rehearsal; repetition; session; study; training6. bore (verb) bore; dig; penetrate; perforate; pierce; prick; punch; puncture; sink; sink a shaft; work with a drill7. catechise (verb) catechise; indoctrinate; instil8. drive (verb) drive; impress; pound9. practice (verb) coach; discipline; exercise; practice; practise; rehearse; teach; train; work out -
8 drill
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9 hole
- hole
- nотверстие; дыра; раковина; полость; канал; шурф; скважина
- anchor hole
- blind hole
- bolt hole
- bored hole
- borer holes
- burn cut hole
- central hole
- clean-out hole
- clearing hole
- connector hole
- discharge hole
- drain hole
- drill hole
- floor hole
- grout hole
- grouting hole
- hand hole
- injection hole
- inspection hole
- mounting hole
- pilot hole
- plug hole
- pot hole
- predrilled hole
- putlog hole
- rivet hole
- rod hole
- sampling hole
- scoured hole
- shot hole
- slick hole
- staggered bolt holes
- tap hole
- threaded hole
- trial hole
- vent hole
- weep hole
Англо-русский строительный словарь. — М.: Русский Язык. С.Н.Корчемкина, С.К.Кашкина, С.В.Курбатова. 1995.
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10 hole
1. скважина, ствол скважины || бурить скважину2. отверстие; дыра || просверливать, делать отверстие3. шурф, выработка малого сечения || закладывать шпуры4. проушина— big hole— bug hole— dib hole— dry hole— end hole— hole in— key hole— pin hole— rat hole— top hole— up hole— wet hole
* * *
1. скважина2. отверстие— dry hole— wet hole
* * *
* * *
1. отверстие; перфорация
* * *
1) скважина; буровая скважина; ствол скважины2) шпур || закладывать шпур3) отверстие ()•hole full of oil — скважина заполнена нефтью;
hole full of salt water — ствол, заполненный солёной водой;
hole full of sulfur water — ствол, заполненный водой, содержащей сероводород;
hole full of water — скважина заполнена водой;
hole gone to water — нефтяная скважина, из которой стала поступать только вода;
to cut a hole — бурить скважину;
to drill a hole — бурить скважину;
to flush a hole — промывать ствол скважины;
to hole in — забуривать скважину;
to keep the hole of gage — поддерживать диаметр ствола скважины близким к номинальному;
to line the hole — крепить скважину обсадной колонны;
to make a hole — бурить скважину; давать проходку, вести проходку;
to open a hole — разбуривать башмак обсадной колонны;
to ream hole — расширять ствол скважины;
to seal a hole — закрывать скважину;
to wash a hole — промывать ствол скважины;
- air holewent back in a hole — вновь спущенный в скважину;
- angled hole
- angled snubbing hole
- angular hole
- auger hole
- bare hole
- barren hole
- bell hole
- bench hole
- big hole
- blank hole
- blast hole
- bleed hole
- blind hole
- bore hole
- bottom hole
- branch hole
- bridged hole
- bug hole
- bung hole
- cable-tool hole
- cased hole
- caved hole
- cave-obstructed hole
- casing hole
- caving hole
- center hole
- charge hole
- churn-drill hole
- circulating hole
- clean hole
- collared hole
- conductor hole
- consolidation hole
- core hole
- cover hole
- crooked hole
- curtain hole
- curved hole
- curving hole
- cushion hole
- dead-end hole
- deadman hole
- deep hole
- definition hole
- deviating hole
- deviated hole
- dia hole
- diamond drilling hole
- dib hole
- dip hole
- directional hole
- discharge hole
- discovery hole
- dog-leg hole
- down hole
- downward sloping hole
- drain hole
- drain branch hole
- drill hole
- drilled hole
- dry hole
- dry hole drilled deeper
- dry hole reentered
- easier hole
- electron beam hole
- elliptical cross-section hole
- elongated cross-section hole
- empty hole
- end hole
- escape hole
- exit hole
- exploration drill hole
- exploratory hole
- favorable-size hole
- filled hole
- filler hole
- filling hole
- flat hole
- fluid-filled hole
- flushing hole
- follow-up hole
- freeze hole
- full-gage hole
- full-gage branch hole
- gage hole
- gas-escape hole
- gas-filled hole
- geophone hole
- gone-off hole
- grout hole
- guide hole
- hammer-drill hole
- high-angle hole
- high-pressure hole
- horizontal hole
- horizontally branched hole
- inclined hole
- in-gage hole
- injected hole
- inspection hole
- intentionally deviated hole
- intermediate hole
- investigation hole
- jet hole
- junked hole
- kelly hole
- kelly rat hole
- key hole
- key seated hole
- large-size hole
- limber hole
- line hole
- lined hole
- liquid-filled hole
- long hole
- lost hole
- lubrication hole
- main hole
- meteorite hole
- mining hole
- misdirected hole
- monitoring hole
- mouse hole
- multiple shot holes
- naked hole
- near gage hole
- observation hole
- offshore hole
- old hole
- open hole
- open-end hole
- original hole
- outlet hole
- out-of-gage hole
- oval-shaped hole
- oversized hole
- parent hole
- pattern holes
- percussion hole
- percussion test hole
- perforated hole
- pilot hole
- pin hole
- plug hole
- pointed-out hole
- post hole
- powder hole
- probe hole
- production hole
- prospecting hole
- protection hole
- province hole
- proving hole
- rat hole
- record hole
- relief hole
- rifled hole
- ring holes
- roof hole
- rough hole
- round hole
- rugose hole
- rust hole
- scout hole
- screen hole
- security hole
- short hole
- shot hole
- shot-drill hole
- shot-open hole
- shrinkage hole
- side hole
- side water hole
- sight hole
- slab hole
- slant hole
- slim hole
- small hole
- small diameter hole
- snake hole
- spiral hole
- spudded-in hole
- sticky hole
- straight hole
- stratigraphic hole
- sump hole
- surface hole
- tapped hole
- tapping hole
- test hole
- thief hole
- threaded hole
- through hole
- tight hole
- top hole
- uncased hole
- undergage hole
- undersized hole
- unfair hole
- up hole
- upward hole
- upward pointing hole
- velocity-test hole
- vertical hole
- vug hole
- washout hole
- water hole
- water-filled hole
- weep hole
- well drill hole
- wet hole
- woodpecker hole* * *• проушина -
11 hole
1) отверстие2) форточка; отдушина3) ход; канал ( для воздуха)4) яма; скважина; шпур; шахта5) углубление6) раковина в отливке ( дефект)7) пробивать; сверлить•to hole through — пробивать насквозь, проходить насквозь ( туннель)
to oversize a hole — "разбивать" отверстие
- air hole- ash hole - balancing hole - bell hole - blast hole - bleed hole - blind hole - blow hole - bolt hole - chimney hole - connector hole - dead hole - deep hole - discharge hole - drain hole - drill hole - escape hole - faceted hole - feeding hole - fixing holes - floor hole - gage hole - grout hole - gully hole - inspection hole - lubricating hole - matched holes - misaligned hole - mortise hole - opened-out hole - outlet hole - out-of-round hole - oversized hole - pilot hole - putlog hole - ragged hole - rivet hole - shot hole - shrinkage hole - sight hole - slant hole - starter hole - unfair holes - well hole* * *отверстие; дыра; раковина; полость; канал; шурф; скважина- anchor hole
- blind hole
- bolt hole
- bored hole
- borer holes
- burn cut hole
- central hole
- clean-out hole
- clearing hole
- connector hole
- discharge hole
- drain hole
- drill hole
- floor hole
- grout hole
- grouting hole
- hand hole
- injection hole
- inspection hole
- mounting hole
- pilot hole
- plug hole
- pot hole
- predrilled hole
- putlog hole
- rivet hole
- rod hole
- sampling hole
- scoured hole
- shot hole
- slick hole
- staggered bolt holes
- tap hole
- threaded hole
- trial hole
- vent hole
- weep hole -
12 hole
1) отверстие || пробивать отверстие; просверливать отверстие2) полость3) канал4) шахта; шурф5) ствол скважины (см. тж
borehole)8) электрон. дырка9) пробивка; мн. ч. перфорация10) трюм11) воздушная яма12) ж.-д. ветка•holes are unfair — отверстия не совпадают;hole for gear lube return — отверстие для возвращения смазки в кожух;to fair rivet holes to each other — совмещать заклёпочные отверстия;to open out hole — разваливать отверстие;to ream hole — 1. развёртывать отверстие 2. расширять ствол скважины-
access hole
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adjusting hole
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advanced feed holes
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air bleed hole
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air blown poke hole
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air hole
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altitude hole
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ash hole
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balancing hole
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beam hole
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bell hole
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biological hole
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blank hole
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blast hole
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bleed hole
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blind hole
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blue hole
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body-size hole
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bolt hole
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bored hole
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box hole
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bung hole
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burnable poison hole
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cable-tool hole
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cased hole
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caved hole
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center hole
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charge hole
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chimney hole
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clearance hole
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closed hole
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code holes
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contacting hole
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contact hole
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control-rod hole
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core hole
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counterbored hole
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coupling hole
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crimp inspection hole
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crooked hole
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cross-drilled hole
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cut hole
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damping hole
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day hole
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definition hole
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diamond drill hole
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die hole
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dip hole
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discharge hole
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discovery hole
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drain hole
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drainage hole
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drill hole
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dry hole
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dust hole
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electron hole
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empty hole
-
eroded hole
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excess holes
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experimental hole
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exploratory hole
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exposure hole
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extra holes
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failure hole
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feed holes
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feeding hole
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filler hole
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fission hole
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floater hole
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floss hole
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flow hole
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free hole
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freeze hole
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fuel hole
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gage hole
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gas hole
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gathering hole
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glory hole
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grout hole
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guide hole
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heavy hole
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hot hole
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inclined hole
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index hole
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indexing hole
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injected hole
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in-line feed holes
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inspection hole
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instrument hole
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investigation hole
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irradiation hole
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large coolant hole
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lead hole
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line hole
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lock hole
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long hole
-
lubrication hole
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manipulator hole
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matte tapping hole
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mobile hole
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mortise hole
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mounting hole
-
observation hole
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oil hole
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oil reservoir hole
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open hole
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orifice hole
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peep hole
-
perforation hole
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photoexcited hole
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pigeon hole
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pilot hole
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pilot pressure hole
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pin hole
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plated-through hole
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plug hole
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pot-hole
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pouring hole
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preheating-flame hole
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probe hole
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puncture hole
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putlog hole
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recess hole
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reference hole
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relief hole
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rivet hole
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rudder hole
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salamander-drain hole
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sample hole
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screw hole
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scum hole
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scupper hole
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security hole
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sham hole
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shearing pin hole
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shield hole
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shot hole
-
shrinkage hole
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shrink hole
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sight hole
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sighting hole
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sink hole
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skimming hole
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skin hole
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slant hole
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slim hole
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small coolant hole
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sounding hole
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spike hole
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spinnerette hole
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spinnerete hole
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sprocket holes
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sprocket removal holes
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sprue hole
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steel-tapping hole
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sticky hole
-
stirring hole
-
tapped hole
-
test hole
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thief hole
-
threaded hole
-
through hole
-
trapped hole
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trimming hole
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turning hole
-
ullage hole
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vacuum suction holes
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vent hole
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water-cooling hole
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weep hole
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wet hole
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working hole -
13 hole
шпур, скважина; закладывать шпуры; бурить; шурф; сбойка; отверстие; сбивать, пробивать, подрубать, проходить•
- angled hole
- angular hole
- auger-hole
- back hole
- bing hole
- blast hole
- bolt hole
- bore hole
- box hole
- bunch holes
- canch hole
- cased hole
- churndrill hole
- connecting hole
- controlled-angle hole
- corner hole
- coyote hole
- crooked hole
- cropper holes
- cross hole
- cut a hole
- cut hole
- day hole
- drill hole
- drilling hole
- dib hole
- diverted hole
- dog hole
- down-hole
- draw hole
- drill hole
- dug hole
- easer hole
- egg hole
- electric cable hole
- empty hole
- end hole
- extra hole
- eyebolt hole
- fan-pattern holes
- fire a hole
- firing hole
- flanking hole
- flat hole
- flushing hole
- foot hole
- gob hole
- glory hole
- gopher hole
- grip hole
- gripping hole
- guide hole
- guide-shoe bolt hole
- gully hole
- hydrauger hole
- inclined hole
- infusion hole
- inspection hole
- intermediate hole
- jack hole
- kettle hole
- key hole
- kibble hole
- knee hole
- lade hole
- lifter hole
- light hole
- line hole
- loaded hole
- make a hole
- man hole
- mill hole
- milling hole
- misfire hole
- miss-shot hole
- natural drainage hole
- oblique hole
- oil hole
- open hole
- ore hole
- outer hole
- outlying hole
- outside holes
- peep hole
- percussion hole
- percussion test hole
- peripheral hole
- pilot hole
- plug hole
- plump hole
- poke hole
- pop hole
- pot hole
- prospect hole
- proving hole
- pull hole
- pyramid cut hole
- ragged hole
- rat hole
- ream hole
- refuge hole
- release hole
- relief hole
- reliever hole
- relieving hole
- rib hole
- ring-fanned holes
- rock-hole
- roof hole
- roof-bolt hole
- safety hole
- scrape out a hole
- second-row hole
- shallow hole
- shaped hole
- short hole
- shot hole
- shot-drill hole
- shoulder hole
- side hole
- side water hole
- sight hole
- sink a hole
- sink-hole
- slab hole
- slim hole
- sludge hole
- small hole
- snake hole
- snubber hole
- spot the holes
- square-up holes
- stable hole
- standardized holes
- stemmed hole
- stope hole
- straight hole
- straight-in holes
- sump hole
- survey hole
- survey plug hole
- tamp a hole
- tap hole
- tapered hole
- test hole
- third-row hole
- toe-hole
- top hole
- trial hole
- trimming hole
- uncharged hole
- unfired hole
- up-hole
- upward hole
- V-hole
- vent hole
- water hole
- water-well hole
- weep hole
- well drill hole
- wet hole
- wild hole -
14 hole
1) отверстие; дыра || вставлять в отверстие, вводить в отверстие2) сверлить•- admission holeto locate off two holes — базировать (напр. детали) по двум отверстиям
- air bleed hole
- air hole
- air supply hole
- alignment hole
- angle hole
- angular hole
- balancing hole
- base hole
- basic hole
- bearing hole
- bell-mouthed hole
- bell-type center hole
- bleed hole
- blind hole
- bolt hole
- bolting hole
- bolt-mounting hole
- bore hole
- bottom hole
- broached hole
- bushed bolt hole
- cast hole
- center hole
- chamfered hole
- charging hole
- chip hole
- clamping hole
- clearance hole
- closed hole
- complex shaped hole
- component hole
- coolant hole
- cooling hole
- coordinating hole
- core diameter hole
- core hole
- cored hole
- cotter hole
- counterbored hole
- crank hole
- cross hole
- cross-drilling hole
- cross-pin hole
- cross-shaft hole
- datum hole
- discharge hole
- dowel hole
- dowel-pin hole
- drain hole
- drift hole
- drill hole
- drilled hole
- drive hole
- driving hole
- entry hole
- escape hole
- feed hole
- fitment hole
- fixing hole
- gage hole
- grid pattern locating holes
- guide hole
- head-accommodating hole
- hinge hole
- hold-down hole
- inlet hole
- inspection hole
- jig-drilled hole
- key hole
- lead hole
- lewis hole
- lobe-shaped hole
- locating hole
- location hole
- lock hole
- lubrication hole
- manufacturing hole
- master location hole
- metering hole
- mounting hole
- mud hole
- off-angle hole
- oil drain hole
- oil hole
- oil spit hole
- open-end hole
- orientation hole
- outlet hole
- out-of-position hole
- out-of-square hole
- oversize hole
- parallel hole
- peep hole
- pigeon hole
- pilot hole
- pin hole
- pitch center holes
- pitched hole
- plated hole
- plated-through hole
- plug hole
- plunger hole
- polygonal hole
- pouring hole
- pouring-in hole
- predrilled hole
- previously drilled hole
- recessed hole
- reference hole
- rivet hole
- rough hole
- rough-bored hole
- sand hole
- screw hole
- shearing pin hole
- shoulder hole
- shrink hole
- shrinkage hole
- sight hole
- sink hole
- slotted hole
- spanner hole
- spindle-through hole
- spring-accommodating hole
- spy hole
- starter hole
- starting hole
- stepped hole
- straight hole
- stud hole
- tap drill hole
- tap drill size hole
- tap hole
- tapered hole
- tapped hole
- threaded hole
- through hole
- through-tool coolant hole
- tightly-packed holes
- tool hole
- tooling hole
- transverse hole
- unfair hole
- upwardly-opening hole
- vent hole
- venting hole
- wire hole
- work stop hole
- working hole
- wrist-pin holeEnglish-Russian dictionary of mechanical engineering and automation > hole
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15 hole
1) дыра
2) буросбоечный
3) дырка
4) дырок
5) дырочка
6) дырочный
7) затрубный
8) лунка
9) перфорация
10) посадочная ямка
11) скважина
12) ухаб
13) отверстие
14) яма
15) скважинный
16) вакансия
17) раковина
– angled hole
– basic hole
– blind hole
– bolt hole
– bott the tap hole
– bottom hole
– center hole
– chambered hole
– cored hole
– cut hole
– disclizing hole
– drain hole
– draw hole
– dross hole
– exhaust hole
– filling hole
– fire hole
– gas hole
– hole bottom
– hole cleanout
– hole clearance
– hole conduction
– hole current
– hole deviation
– hole diffusion
– hole distortion
– hole filter
– hole injection
– hole injector
– hole migration
– hole mobility
– hole reamer
– hole semiconductor
– hole sowing
– hole springing
– hole tone
– hole torpedoing
– hole trap
– hole washing
– inspection hole
– jewel hole
– locating hole
– lubricating hole
– main hole
– mine hole
– Mohorovicic hole
– mortise hole
– oil drain hole
– oil-filling hole
– open out a hole
– originate a hole
– pilofacturing hole
– pilot hole
– plug hole
– plug up the tap hole
– poking hole
– punch a hole
– punch hole
– ream a hole
– registration hole
– rivet hole
– salamnder-drain hole
– sand hole
– screw hole
– seed hole
– sense a hole
– shaft hole
– stoke hole
– stop hole
– straight hole
– suction hole
– tap a hole
– tap hole clay
– threaded hole
– through hole
– trip in hole
– tuyere hole
-
16 hole
отверстие; дыра; раковина; яма; проушина; скважина; шпур; шурф; (основное) отверстие (в системе допусков и посадок); раковина (в отливке); выбоина (в дороге); II делать отверстие; просверливавть; продырявливать; бурить скважину; закладывать шпуры- hole gauge - hole tolerance- air hole- ash hole- blast hole - centre hole - charging hole- cut hole- cutout hole - dry hole - floss hole - grout hole - jewel hole - line hole - lewis hole - lubrication hole - nave-hole - oil hole - open hole - oversize hole - peep hole - pilot hole - pin hole - plug hole - pot-hole - prospect hole - rivet hole - screw hole - seed hole - shot hole - shot-drill hole - side hole - slab hole - slotted hole - snake hole - snubber hole - spout hole - spray hole - stirring hole - sump hole - tapped hole - test hole - unfair hole - upward hole - water hole - water-well hole - winding hole -
17 pilot
1) летчик
2) лоцман
3) лоцманский
4) пилот
5) пилотируемый
6) опытный
7) экспериментальный
8) вести
9) управлять
10) управляющий
11) пилот-волна
12) пилотный
13) ловитель
14) рулевой
15) контрольный
– automatic pilot
– civil pilot
– mechanical pilot
– pilot bell
– pilot brush
– pilot burner
– pilot carrier
– pilot cell
– pilot channel
– pilot chute
– pilot drill
– pilot electrode
– pilot error
– pilot flame
– pilot frequency
– pilot fuse
– Pilot head
– pilot hole
– pilot lamp
– pilot model
– pilot plant
– pilot production
– pilot project
– pilot raise
– pilot shop
– pilot signal
– pilot survey
– pilot tap
– pilot valve
– pilot wave
– pilot wire
– project pilot
– rated pilot
– robot pilot
– test pilot
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18 drill
1) сверло
2) бурить
3) буровой
4) высверливать
5) высевающий
6) дрель
7) забуривать
8) забурник
9) иссверливать
10) набуравливать
11) набурить
12) наверчивать
13) насверливать
14) разбуривать
15) разбурить
16) упражнение
17) коронка
– air-feed drill
– auger drill
– blunt drill
– bow drill
– breast drill
– cable drill
– carbide-insert drill
– carbide-tip drill
– center drill
– chisel drill
– chuck drill
– core drill
– countersink drill
– cross drill
– crown drill
– deep-hole drill
– detachable drill
– diamond drill
– drag drill
– drill a borehole
– drill bit
– drill bit workshop
– drill bow
– drill box
– drill chamber
– drill dust
– drill log
– drill pick
– drill pipe
– drill point
– drill run-off
– drill shaft
– drill steel
– drill string
– drill team
– electric drill
– feed drill
– flat drill
– full-hole drill
– grind drill
– gun drill
– half-round drill
– hand drill
– hand-held drill
– one-piece drill
– percussion drill
– percussive drill
– pilot drill
– rock drill
– rotary drill
– rotative drill
– shot drill
– star drill
– tap drill
– tapping drill
– telescopic drill
– track-mounted drill
– trepanning drill
– twist drill
– web thinning of drill
– withdraw drill
– wood drill
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19 drill
1) бур || бурить2) сверло3) сверление || сверлить, высверливать4) дрель6) буровой станок, перфоратор7) упражнение, тренировка8) борозда; колея9) с.-х. рядовой посев•to drill in — завершать скважину; вскрывать продуктивный пласт
to drill off — горн. обуривать ( забой)
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20 pilot drill hole
Нефть и газ: пилотная скважина
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См. также в других словарях:
Pilot hole — A pilot hole is a smaller hole drilled into a material prior to a larger hole being drilled, widening the hole to the desired width. Drilling a pilot hole prevents a larger drill bit from slipping on the material a potential safety hazard, as… … Wikipedia
pilot hole — When using a large drill bit, it is sometimes hard for the drill to cut through the metal and do it evenly in a straight line. A pilot hole is first made with a small bit. Then, when you use the large bit, the drilling is much easier … Dictionary of automotive terms
pilot hole — noun A narrow hole drilled or punched into a surface, to facilitate the insertion of a wider screw, nail, drill bit, or other boring tool. During the sinking of the last 150 feet, a pilot hole was kept in advance, so as to prevent any unforeseen… … Wiktionary
Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry … Wikipedia
Hole saw — Not to be confused with Core drill. A 52 mm (2.0 in) hole saw with pilot bit … Wikipedia
pilot bit — noun a small bit that drills a first hole to guide a larger drill • Hypernyms: ↑bit … Useful english dictionary
Butt joint — For the geometry in welding, see Butt joint (welding). A butt joint is a joinery technique in which two members are joined by simply butting them together. The butt joint is the simplest joint to make since it merely involves cutting the members… … Wikipedia
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tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium
Directional boring — A small directional boring unit in action Directional boring, commonly called horizontal directional drilling or HDD, is a steerable trenchless method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore… … Wikipedia