- المجال: 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 ...
Alternating current in which three separate pulses are present, identical in frequency and voltage, but separated by 120 degrees .
Industry:Mining
Alternative term for factor of stress concentration in fatigue or fatigue strength reduction factor.
Industry:Mining
Although not actually set by law, the generally accepted maximum direct current trolley voltage is considered to be 300 V. The use of alternating current voltages above 220 V in mines is usually permitted, provided the conductors are properly insulated and the cables end in suitable terminal boxes.
Industry:Mining
Alum that has been dried at 200 degrees C, and powdered; AINH<sub>4</sub>(SO<sub>4</sub>)<sub>2</sub>or AIK(SO<sub>4</sub>)<sub>2</sub>. A caustic.
Industry:Mining
Alum that has been dried at 200 degrees C, and powdered; AINH<sub>4</sub>(SO<sub>4</sub>)<sub>2</sub>or AIK(SO<sub>4</sub>)<sub>2</sub>. A caustic.
Industry:Mining
Alum that has been dried at 200 degrees C, and powdered; AINH<sub>4</sub>(SO<sub>4</sub>)<sub>2</sub>or AIK(SO<sub>4</sub>)<sub>2</sub>. A caustic.
Industry:Mining
Alumina-silica refractories containing 45% or more alumina.
Industry:Mining