Synonyme wurden verwendet für:
Bergbau
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keywords:(Bergbau)
The steam tractor hauling ore in Washington
The menace from the direction of Urga
Gathering without animals locomotives or conveyors
Economic and reliable systems of automatic control of underground transportation
Safety evaluation of underground diesel equipment
LKAB's rail haulage control system optimizes ore yield
Hard-facing on wheels of mine cars and locomotives
Experience with diesel haulage units-underground
Experience with underground diesels
New machine for loading and ore handling