Synonyme wurden verwendet für:
Coal mines and mining
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keywords:("Coal mines and mining")
Accidents at coal face and their prevention
Aerial ropeway for transporting coal
Aerial tramway is transportation link at Pond Creek
A haulage system with gathering locomotives only
A haulage system with gathering locomotives only
Airlift and lift equipped with container feeders
A letter to a commissioner of the inland navigation : concerning the Tyrone collieries
Analysis of performance of some sections of underground transportation
An introduction in the planning and control of methan drainage ranges using computers