- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 lamellar mixture of ferrite and cementite in the microstructure of slowly cooled ironcarbon base alloys occurring normally as a principal constituent of both steel and cast iron.
Industry:Mining
The laminae or thin plates in repeated or polysynthetic twins. Compare: polysynthetic twinning; repeated twinning.
Industry:Mining
The land surface between the projected outcrop of the lowest coalbed being mined along each highwall and a valley floor.
Industry:Mining
The large, deep, cast-iron box into which the stamps fall and the ore is fed in a gold or silver stamp mill.
Industry:Mining
The largest diameter of work that can be carried between the centers of a lathe. In England, the swing refers to radius.
Industry:Mining
The last roll, or the one that does the finest crushing in ore dressing, esp. in stage crushing.
Industry:Mining
The last stump or corner block of coal left when extracting pillars by means of lifts, in pillar methods of working.
Industry:Mining
The last unfulfilled offer to sell at cash price at the close of the second morning on the London Metal Exchange, prevails as the accepted cash price for the metal for the succeeding twenty-four hours.
Industry:Mining
