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
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
Safety evaluation of underground diesel equipment
Air lift to labrador iron fields