ホーム >  Term: long hole
long hole

Underground boreholes and blastholes exceeding 10 ft (3.05 m) in depth or requiring the use of two or more lengths of drill steel or rods coupled together to attain the desired depth. Compare: long-hole drill

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作成者

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 ポイント
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