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United States Bureau of Mines
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 ...
Pneumoconiosis occurring in iron workers from inhalation of particles of iron.
Industry:Mining
Pocketed, as when face bars are set with the face end of the bar pocketed into the coal adjacent to the roof.
Industry:Mining
Pockets at the bottom of a breaker through which the processed coal falls as it is loaded into railroad cars; also the cars.
Industry:Mining
Pocket-sized beam scale of Chinese origin used in valuation of alluvial tin gravels. The beam is so calibrated as to read in catties per cubic yard when concentrates from washing of 1/4 ft<sub>3</sub>(0.007 m<sub>3</sub>) are weighed.
Industry:Mining
Point at which the rock is discharged. Its short dimension varies, depending upon whether the swing jaw is in the open or closed position.
Industry:Mining
Point of deflection on a refraction time-versus-distance graph separating two segments that correspond to different wave paths.
Industry:Mining
Points placed on a railway line to derail a train that has been incorrectly signaled.
Industry:Mining
Polarization that is inclined to the linear dimensions of a magnetized body, or to the plumb line or the horizon.
Industry:Mining
Polygon in which neither the sides nor the angles are equal.
Industry:Mining
Polyhedral crystals formed by spontaneous crystallization in the interior of a mass of metal in a mold. Distinguished from columnar crystals and chill crystals.
Industry:Mining
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