“harmless-depth theory”的概念、定义、翻译、参考文献-科学参考

单词	harmless-depth theory
释义	harmless-depth theory [`härm·lǝs ¦depth ´thē·ǝ·rē] ^{MINING ENGINEERING} Formerly, the hypothesis that there was a certain depth below which mining could be carried on without risk of damage to the surface.
随便看	handpicking hand punch handrail hand-rammed hand-reset hand rule hand sampling handsaw Hand-Schüller-Christian disease handset handset bit handshaking hand-shoulder syndrome handspike hand sugar refractometer hand-tight hand time hand tool hand tramming hand truck hand type hand viewer hand weapon hand winch hang

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