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