- 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 ...
A specified allowance (either plus or minus) of the given dimensions of a finished product to take care of inaccuracies in workmanship of parts to be fitted together. The amount allowed as tolerance is generally small as compared with the standard dimension of the part; e.g., the tolerance allowed in the set diameters of a diamond bit is + or -0.02 mm.
Industry:Mining
A specimen or individual designated as type of a species or lesser group and serving as the final criterion of the characteristics of that group.
Industry:Mining
A spectrum regarded as characterizing the body that emits the rays rather than one through which they pass.
Industry:Mining
A spike generally used to fasten rails to the sleepers when laying track. Their length should be 1/2 in (1.27 cm) less than the depth of the sleeper into which they are being pounded.
Industry:Mining
A spiral chute having a center core or column about which it is fabricated, with the core serving as the inside guard.
Industry:Mining
A spiral chute in which the plate is inclined towards the center of the spiral. The stone tends to flow down centrally, the coal tends to slide off around the outside of the spiral. They are seldom used as coal cleaners.
Industry:Mining
A spiral or flutelike, round-topped ridge, sometimes seen on the outside surface of a drill core.
Industry:Mining
