Synonyme wurden verwendet für:
Coal mines and mining
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keywords:("Coal mines and mining")
Safety of underground transport
Locomotive and mine-car systems
Extraction of stoops by shuttle cars and loaders
Betriebskosten und Selbstkosten der Zechenbahnen
Haulage accidents in coal mines
Aerial ropeway for transporting coal
The Tilmanstone aerial ropeway
The prevention of haulage accidents
A haulage system with gathering locomotives only
Big wheel loaders handle many jobs
Airlift and lift equipped with container feeders
Transportation of pipes, long lumber, and rails in Friedrich Heinrich mine
Development of vertical drum (Dranyam) shearer loader
Shuttle-car accidents in thin seams
Good roads essential in strip-mine truck haulage
Entry driving with cable reel shuttle cars
Substantial progress by no means restricted in 1939 to mechanical loading and transport at face