Synonyms were used for:
Bergbau
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keywords:(Bergbau)
Gathering without animals locomotives or conveyors
A haulage system with gathering locomotives only
The prevention of haulage accidents
Haulage traffic expedited by dispatching
Face pressure and cleat in underground workings
Face pressure and cleat in underground workings
Handling freight to outlying mining operations
Underground haulage by locomotives
Haulage delays: Causes and remedies
Safety record of coal industry shows improvement despite increasing hazards