“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	sport development pattern sport development strategy sport dialectics sport disciplinary punishment sport economy sport epistemology sport essentialism sport ethics sport fishing bait sport fishing contest sport fishing spot sport fishing tackle sport fishing technique sport for all sport governance sport hunting sport injury sport law science sport laws of Republic of Portuguese sport laws of the Russian Federation sport lifestyle sport management Sport Management Branch of China Sports Science Society sport movie sport ontology

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