- 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 ...
The available power loss of a transducer connecting an energy source and an energy load is the transmission loss measured by the ratio of the source power to the output power transducer.
Industry:Mining
The average abundance of an element in the crust of the Earth. Compare: clarke of concentration
Industry:Mining
The average load per unit of area required to produce failure by rupture of a supporting soil mass.
Industry:Mining
The average number of feet of borehole a bit may be expected to drill in a specific type of rock under normal operating or specified conditions.
Industry:Mining
The average number of feet of borehole specific types of drill bits can be expected to drill in a certain rock before the bit becomes dulled and is replaced, discarded, resharpened, or reset.
Industry:Mining
The average number of tons of a specified material to be carried by a conveyor per hour, based on total operating-shift tonnage.
Industry:Mining
The average quantity of oil, gas, or water recovered from 1 acre (0.4 ha) of a reservoir.
Industry:Mining
The average relative weight of the atoms of an element referred to an arbitrary standard of 16.0000 for the atomic weight of oxygen. The atomic weight scale used by chemists takes 16.0000 as the average atomic weight of oxygen atoms as they occur in nature. The scale used by physicists takes 16.00435 as the atomic weight of the most abundant oxygen isotope. Division by the factor 1.000272 converts an atomic weight on the physicists' scale to the corresponding atomic weight on the chemists' scale.
Industry:Mining
The azimuth measured clockwise from magnetic north through 360 degrees ; the angle at the point of observation between the vertical plane through the observed object and the vertical plane in which a freely suspended magnetized needle, influenced by no transient artificial magnetic disturbance, will come to rest.
Industry:Mining
