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sediment tube

A long open tube fixed above the core barrel in the shot-drill method of exploratory boring. The enlarged space above the sediment tube reduces the upward velocity of the flushing water and the coarse chippings are deposited in the tube where they are retained until drawn up to the surface.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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