“vertical shaft”的概念、定义、翻译、参考文献-科学参考

单词	vertical shaft
释义	vertical shaft Encyclopedia 工学辅助坑道设计释 vertical shaft竖井为增加水平向隧道主洞工作面，缩短出渣进料运输距离，而在隧道上方开挖的与隧道相连的竖向坑道。
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