Synonyme wurden verwendet für:
Kohle
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keywords:(Kohle)
The application of traveling belts to the shipment of coal
Some notes on the bord-and-pillar system of work
Gobbin quarry and railway at the Saint-Etienne collieries
Further economics of coal and ore handling
Shipping coal by the aerial wire rope system at Port Morien, Cape Breton
Shipping coal by the aerial wire-rope system at Port Morien, Cape Breton