“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	field strength superposition principle field strength tensor field study field surface radiation temperature field surgery field surgical light field surgical shelter field surgical vehicle field survey of magnetic prospecting field sweep mode field sweet field synergy number field tax adjustment method field temperature field tent hospital system field theodolite field-theoretic field-theoretical method field theory field theory of learning field thistle herb field topology field tower field transition arch field triage

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