- 업종: 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 ...
A light carried at the back end of a car, train, trip, or movable machinery.
Industry:Mining
A light crane traveling on an overhead channel iron and a single rail vertically beneath this in the floor.
Industry:Mining
A light drive shaft inside a heavier one, and turning independently of it.
Industry:Mining
A light platform in the bottom of powder magazines to preserve the powder from dampness.
Industry:Mining
A light shot of explosive placed on the top of a piece of shale that is too large to handle, in order to break it.
Industry:Mining
A light to very dark brown variety of quartz sometimes used as a semiprecious gemstone.
Industry:Mining
A light to very dark brown variety of quartz sometimes used as a semiprecious gemstone.
Industry:Mining
A light to very dark brown variety of quartz sometimes used as a semiprecious gemstone.
Industry:Mining
A light, silvery-white, and fairly tough metal. Symbol, Mg. It does not occur uncombined, is found in large deposits in the form of magnesite, dolomite, and other minerals. Readily ignites upon heating. Used in flashlight photography, flares, and pyrotechnics, including incendiary bombs. Its alloys are essential for airplane and missile construction.
Industry:Mining
A light, silvery-white, ductile metal with high electrical conductivity and good resistance to corrosion. Obtained from bauxite. Symbol, Al. It is the lightest of the metals in general use commercially and is the basis for light alloys used in the construction of modern aircraft and rockets; aluminum coatings are used for telescope mirrors, decorative paper, packages, and toys. The oxide, alumina, occurs naturally as ruby, sapphire, corundum, and emery.
Industry:Mining
