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drainman

A laborer who regulates flow of tailings, through flumes or pipes (mixture of waste materials and water resulting from treatment of ore for recovery of valuable minerals) in back filling (filling of working places from which all ore has been mined) in such manner that water will be drawn off and the sand left for filling purposes.

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创建者

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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