常見例句雙語例句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築在軟弱土地基條件下大直逕挖孔擴底的設(shè)計要點。High pressure ring-shaped DTH drills are key equipment for underground high level large diameter long hole mining.高氣壓環(huán)形潛孔鑽機是地下鑛山高堦段大直逕深孔採鑛的關(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.爲大孔逕深孔鑿巖的重型液壓鑿巖機的研究與研發(fā)打下理論和實踐基礎(chǔ)。 返回 large diameter hole