large diameter hole

常见例句

This paper introduces the key point of design of club-footed pile in large diameter hole in soft earth base.
文章介绍了选煤厂建筑在软弱土地基条件下大直径挖孔扩底的设计要点。
High pressure ring-shaped DTH drills are key equipment for underground high level large diameter long hole mining.
高气压环形潜孔钻机是地下矿山高阶段大直径深孔采矿的关键设备。
What we have done in this paper is of great significance in designing the heavy rock drill to drill deep and large diameter hole.
为大孔径深孔凿岩的重型液压凿岩机的研究与研发打下理论和实践基础。