Synonyms were used for:
Bergbau
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Accidents at coal face and their prevention
Accounting methods at Roan Antelope
Advantages of moving iron ore by underground conveyors
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
Air lift to labrador iron fields
Airplane transport to remote Peruvian mines
A means of securing main haulage roads and return airways of a mine otherwise than with timber
Analysis of performance of some sections of underground transportation
An automatic signal system for crossovers on underground railways operated by electric locomotives