air-lift reverse circulation drilling technology 气举反循环技术 Air-Lift Reverse Circulation Drilling Rig 气举反循环钻机 ..
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介绍了应用气举反循环钻进工艺解决这些疑难技术问题的成功案例。
The paper introduces the typical examples for resolving these problems by air-lift reverse circulation drilling technology.
本文着重阐述了气举反循环理论和机具制做方法，从而解决了在岩溶发育地区的施工技术难题。
The author has made an exposition of the theory of airlift reverse circulation machines and tools, and its making way as well, which has solved the construction technical difficulty.
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