常見(jiàn)例句雙語(yǔ)例句Dealt with engineering examples, this paper discusses some features of air-lift reverse-circulation large hole drilling and existing main problems.結(jié)合工程實(shí)例，對(duì)大口徑氣舉反循環(huán)鉆進(jìn)特點(diǎn)及存在主要問(wèn)題，進(jìn)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.大口徑鉆孔灌注樁的入巖問(wèn)題，歷來(lái)是廣西基礎(chǔ)施工中的一大難題。 返回 large-hole drilling