The Larger Reverse Circulation Bits Used for Drilling Through Pebbles
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席云峰.卵砾石层大直径反循环桩孔钻进用钻头[J].钻探工程,2003,30(4):42-42,54.. The Larger Reverse Circulation Bits Used for Drilling Through Pebbles[J]. Drilling Engineering, 2003,30(4):42-42,54.
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- 收稿日期:2002-08-19
- 最后修改日期:2002-08-19
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