“undercutting level”的概念、定义、翻译、参考文献-科学参考

单词	undercutting level
释义	undercutting level Encyclopedia 工学开拓工程释 undercutting level拉底水平为地下矿山回采工作开辟底部自由面，由拉底巷道向两侧扩帮，将矿房底面拉开至足够大，补充爆破空间或者为应力作用下矿石自然崩落创造条件而进行开挖的作业水平。
随便看	Duck Bay duck-billed platypus duck egg duck-fish farming system duck hepatitis A virus，DHAV Duck Hunting duck husbandry in biological fermentation bed duck husbandry in raised wire-floor duck-pearly mussel farming system duck plague duck plague virus，DPV duck-shaped bronze vessel duck tembusu virus, DTMUV duck virus hepatitis duckweed ducon duct DUCTAC ducted fan ducter duct fiber cable ductile ductile-brittle transition ductile-brittle transition temperature ductile deformation

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