- 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 ...
A leveling staff, marked with graduations so that an observer looking through the telescope of a level can read the elevation at which his or her line of sight intersects the staff.
Industry:Mining
A lever that pulls two grabhooks together, and holds them by locking over center.
Industry:Mining
A lever to which force is applied between the fulcrum and the work point.
Industry:Mining
A lever whose force is exerted between the fulcrum and the point where it is applied.
Industry:Mining
A lever-type beam that is held down at one end, is supported near the middle, and supports a load on the other end.
Industry:Mining
A lift (pump) of small size with esp. heavy castings to resist the force of blasting; used in shaft sinking. A sinking pump, which is also sometimes called a sinker.
Industry:Mining
A light and dark green variety of pumpellyite in green pebbles of banded structure; occurs in the Lake Superior region, MI.
Industry:Mining
A light belt conveyor employed at the face. It is the type generally used in conventional machine mining.
Industry:Mining
A light brown resinous substance found in brown coal in Devonshire, England.
Industry:Mining