- 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 ...
An active electron device that converts input power into a very narrow, intense beam of coherent visible or infrared light; the input power excites the atoms of an optical resonator to a higher energy level, and the resonator forces the excited atoms to radiate in phase. Derived from "light amplification by stimulated emission of radiation." See also: maser
Industry:Mining
An acute bronchitis often occurring among pottery employees, eventually affecting the lungs.
Industry:Mining
An adaptation of any of several types of conveyors used for removing heavy solids from settling tanks or basins.
Industry:Mining
An adaptation of the auger surface miner, the thin-seam miner cuts an entry 8 ft (2.4 m) wide and up to 5 ft (1.5 m) high into coal located under the highwall in surface mines.
Industry:Mining
An adapted coal-cutting machine in which the picks of the cutter chain are replaced by loading flights. The machine hauls itself along the face, the jib leading, by means of an anchored rope. The flights push the prepared coal up a ramp onto the face conveyor, and on their return path to the back of the prepared coal; they fold back and then open up for coal loading as they emerge at the end of the jib. It requires well-prepared coal for successful operation, and will load only in one direction; consequently it has to be flitted back along the coal face. The jib can be swung into line with the body for flitting.
Industry:Mining
An adapter or coupling in a reaming pilot assembly attached to the reaming pilot adapter. It passes through the reaming shell and casing bit to which is attached the pilot bit.
Industry:Mining
An adapter or coupling in a reaming pilot assembly that attaches the flush-joint casing to the casing reaming shell and the reaming pilot horn by pin and box threads, respectively.
Industry:Mining
An additional intake that is a component part of a system of controlled leakage.
Industry:Mining
