The Mining Magazine

The Mining Magazine

4.11 - 1251 ratings - Source

trailer pump of 350 to 500 gal. per minute capacity for fire-fighting use. ... metal- clad draw-out type oil-brake switchgear from 30 to 1, 600 amp. capacity and pressures up to 3, 300 volts and electric control ... display of experimental work in high voltage, using a 300, 000-volt impulse generator. ... switchgear unit, a diagram control panel with shadowgraph instruments, a standard horizontal metal-clad circuitanbsp;...

Title:The Mining Magazine
Publisher: - 1938


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