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Bergbau
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Wplyw dlugosci drogi hamowania na koncentracje przewozu glownego w podziemiach kopaln
With mechanical loading, cars can be manipulated if face be well shot and trips available
With hand shoveling 10 tons per man and 26 tons per loader already attained
Winning and transport of raw materials used in ceramic industries: discussion
Will this 75-ton electric truck revolutionize open pit haulage
Wholesale first-aid training reduces mining accidents
We sliced cost of handling in half
Utah copper company builds railroad tunnel
Use of trolleyphones speeds mainline haulage
Use and handling of mine cars in british collieries
Underground transportation in coal mines
Underground railroading at Mathies
Underground photography as aid to accident prevention