- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A tape correction applied to the apparent length of a level base line to counteract the sag in measuring tape.
Industry:Mining
A taper bit, generally a bullnose type, used to drill down past the deflecting wedge when deflecting a borehole.
Industry:Mining
A tapered core bit having the cutting face set in the same manner as a step-face bit.
Industry:Mining
A tapered cylinder, generally of wood, placed in a borehole and into which a deflection drive wedge may be driven in a random or oriented position.
Industry:Mining
A tapered cylinder, generally of wood, placed in a borehole and into which a deflection drive wedge may be driven in a random or oriented position.
Industry:Mining
A tapered float rises or falls in a transparent tube in accordance with the velocity of the rising liquid. Variations include spinning floats and magnetic or radioactive ones for use with opaque fluids. Rate-of-flow indicator.
Industry:Mining
A tapered-nose noncoring bit, used to ream out a borehole alongside a steel deflecting wedge in hole-deflection operations.
Industry:Mining
A tapered-nose noncoring bit, used to ream out a borehole alongside a steel deflecting wedge in hole-deflection operations.
Industry:Mining
A tapered-nose noncoring bit, used to ream out a borehole alongside a steel deflecting wedge in hole-deflection operations.
Industry:Mining
A tapered-nose noncoring bit, used to ream out a borehole alongside a steel deflecting wedge in hole-deflection operations.
Industry:Mining
