- 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 ...
Purified ammonia gas, NH<sub>3</sub>, liquefied by cold and pressure.
Industry:Mining
Pyrite, round or oval in plan and lenticular in section, ranging up to 2 to 3 ft (0.6 to 0.9 m) in thickness and several hundred feet in the greatest lateral dimension, that is found in coalbeds. Sometimes called kidney sulfur.
Industry:Mining
Pyroclastics that may be either essential, accessory, or accidental in origin, of a size range that has been variously defined within the limits of 2 mm and 64 mm. The fragments may be either solidified or still viscous when they land (though some classifications restrict the term to the former); thus there is no characteristic shape. An individual fragment is called a lapillus. Compare: cinder
Industry:Mining
Pyrotechnic devices such as a hot-wire fuse lighter or igniter cords for the rapid and certain lighting of safety fuse. See: tchesa stick
Industry:Mining
Quadrilateral that has opposite sides parallel and opposite angles equal.
Industry:Mining
Quantitative chemical analysis in which the different substances of a compound are measured by weight.
Industry:Mining
Quantities defining the horizontal position of a point on an ellipsoid of reference with respect to a specific geodetic datum, usually expressed as latitude and longitude. These may be referred to as geodetic positions or geographic coordinates. The elevation of a point is also a geodetic coordinate and may be referred to as a height above sea level.
Industry:Mining
