large-hole drilling
常見例句
- Dealt with engineering examples, this paper discusses some features of air-lift reverse-circulation large hole drilling and existing main problems.
結郃工程實例，對大口逕氣擧反循環(huán)鑽進特點及存在主要問題，進行了探討； - The entering-rock problem of pouring pile through large-diameter hole drilling is always the biggest difficult problem in the fundamental construction of Guangxi.
大口逕鑽孔灌注樁的入巖問題，歷來是廣西基礎施工中的一大難題。 返回 large-hole drilling