Synonyme wurden verwendet für:
Bergbau
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keywords:(Bergbau)
Use and handling of mine cars in british collieries
Underground photography as aid to accident prevention
Underground haulage with locomotives and mine cars
Underground haulage by locomotives
Trolley wire locomotive haulage
Transportation problem solved with belt conveyors
Transportation at Eunice mines
Track-mounted surge cars speed entry development
Track brakes for man-riding vehicles
Track brakes for man-riding vehicles
The steam tractor hauling ore in Washington
The prevention of haulage accidents