- 行业: Mining
- Number of terms: 33118
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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 ...
The relative density of a gas or vapor as compared with some specific standard (as hydrogen). Abbrev., v d.
Industry:Mining
The relative effectiveness of a given kind of ionizing radiation in producing a biological response as compared with 250,000 electron-volt gamma rays. Abbrev., rbe.
Industry:Mining
The relative ignitability of a dust cloud may be defined as the degree of ease with which it can be ignited.
Industry:Mining
The relative rate of flow per unit area of a particular constituent of a mixture divided by the gradient of composition, temperature, or other property considered to be causing the diffusion.
Industry:Mining
The relatively undeformed rocks beneath the plane of an overthrust fault.
Industry:Mining
The release of energy in the superincumbent strata above the seam, induced by the extraction of the seam.
Industry:Mining
The reluctance of a body to change its state of rest or of uniform velocity in a straight line. Inertia is measured by mass when linear velocities and accelerations are considered and by moment of inertia for angular motions (that is, rotations about an axis).
Industry:Mining
The remote manual operation of equipment that is usually not within the direct eyesight of the operator, yet the operator requires and is provided with sensory information (sight, sound, accelerations, etc.) for effective manual control.
Industry:Mining
