Extension of Combination Drilling Technique of Pneumatic Down-the-hole and Air-lift Reverse Circulation
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许刘万 史兵言 李国栋.大力推广气动潜孔锤及气举反循环组合钻进技术[J].钻探工程,2007,34(9):41-45.. Extension of Combination Drilling Technique of Pneumatic Down-the-hole and Air-lift Reverse Circulation[J]. Drilling Engineering, 2007,34(9):41-45.
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