large-hole drilling

基本解释

• [能源科学技术]大井眼钻井

英汉例句

双语例句

• Dealt with engineering examples, this paper discusses some features of air-lift reverse-circulation large hole drilling and existing main problems.
  结合工程实例，对大口径气举反循环钻进特点及存在主要问题，进行了探讨；
• The entering-rock problem of pouring pile through large-diameter hole drilling is always the biggest difficult problem in the fundamental construction of Guangxi.
  大口径钻孔灌注桩的入岩问题，历来是广西基础施工中的一大难题。

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词组短语

短语

• Large diameter long -hole drilling 大直径深孔凿岩

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专业释义

能源科学技术

• 大井眼钻井