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primary haulage

A short haul in which there is no secondary or mainline haulage; e.g., a mine is started into a hillside, using mine cars, track, and hand loaders. An empty car is placed for the loader, and the loaded car is taken to the dump manually or by machine, repeating the process for each loader.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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