“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	iron sulfate iron sulfate heptahydrate iron sulfides iron-sulfur centre iron-sulfur protein iron sword in Spring and Autumn Period,Lingtai Iron Sword with Jade Handle of Guo State iron telluride iron triangle iron trichloride Iron Weapons from Han Dynasty Tomb at Mancheng Iron Weight of the Wuping Reign irony iron(Ⅱ,Ⅲ) oxide Iroquois IRPA IRPS IRR irradiance irradiance of Lambert source irradiance of point source irradiant irradiate irradiation irradiation as a phytosanitary treatment

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