Synonyme wurden verwendet für:
Bergbau
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keywords:(Bergbau)
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
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 menace from the direction of Urga
Strip mine converts to automotive haulage
Spacing of sets on endless haulages
Some experiences with diesel underground supplies vehicles
Solid tires on shuttle cars cut operating costs