Synonyme wurden verwendet für:
Bergbau
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keywords:(Bergbau)
Haulage accidents in north-eastern division of National Coal Board
Shuttle cars -- Room-and-pillar retreat mining in thin seam
Derailments on main and tail haulages, and on direct rope haulage
Development of vertical drum (Dranyam) shearer loader
Belt pulls shuttle car output up 7 percent grade at Standard
Man-riding haulages in Lancashire
Haulage traffic expedited by dispatching