“shaft boring”的概念、定义、翻译、参考文献-科学参考

单词	shaft boring
释义	shaft boring Encyclopedia 工学特殊凿井法释 shaft boring矿山钻井法用钻井机钻凿竖井井筒的特殊凿井法。在地面采用大直径钻井机向地层钻进竖井，以洗井液护壁并排渣，悬浮下沉预制井壁作为永久支护，实现人员不下井的机械化凿井方法。
随便看	sample percentile sample plot sample point sample-population approach sample prepairing for microscopic-observing sample preparation sample preparation chip sample preparation/digestion equipment sample preparation instrument sample pretreatment sample pretreatment of free drug analysis sample pre-treatment technology sample pretreatment technology for pharmaceutical analysis sample process sample proof sample proportion sample quantile sample quartile sampler sample range sample raw moment sample regression coefficient sample representativeness sample residual dispersion sample rotation

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