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Bit r
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
P.m. the speed at which a bit is rotated, expressed in the number of revolutions per minute.
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Revolutions, английский
[rotation] per minute оборотов в минуту
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Expansion bit, английский
- Paddy bit.
- A drill bit that may be adjusted to cut various sizes of holes. the adjustment of some types may be accomplished by mechanical means while the bit is inside the borehole. also called paddy or paddy bit.
Hall-, английский
-owe wedge. a tapered concave metal plug or wedge that can be set in a drill hole at a predetermined depth and bearing to deflect or straighten an off-course borehole. 50 a glossary of the diamond-drilling industry
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