“shaft drilling”的概念、定义、翻译、参考文献-科学参考

单词	shaft drilling
释义	shaft drilling Encyclopedia 工学竖井施工方案释 shaft drilling竖井凿岩竖井施工中，在井筒围岩上钻凿炮孔的作业。是竖井掘进中的一项主要工序，约占整个掘进循环时间的20%～30%。
随便看	graph norm graphoanalysis graphoanalytic method graph of a function graph of a mapping graph of an equation graph of an operator graph of a relation graph of broken lines graph of direct proportion graph of inverse proportion graph of partial orders graph of reservoir operation graphoid graph OLAP graphology graph operation graph order graph orientation graphosphere grapho-vocal method graph paper graph parameter graph periphery graphplan

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