large-hole drilling
常见例句
- 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。 返回 large-hole drilling