large diameter hole

基本解釋

This paper introduces the key point of design of club-footed pile in large diameter hole in soft earth base.
文章介紹了選煤廠建筑在軟弱土地基條件下大直徑挖孔擴(kuò)底的設(shè)計(jì)要點(diǎn)。
High pressure ring-shaped DTH drills are key equipment for underground high level large diameter long hole mining.
高氣壓環(huán)形潛孔鉆機(jī)是地下礦山高階段大直徑深孔采礦的關(guān)鍵設(shè)備。
What we have done in this paper is of great significance in designing the heavy rock drill to drill deep and large diameter hole.
為大孔徑深孔鑿巖的重型液壓鑿巖機(jī)的研究與研發(fā)打下理論和實(shí)踐基礎(chǔ)。