“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	ratio of Output-to-input ratio of oxygen to uranium ratio of patient beds ratio of progression ratio of similitute ratio of specific heat capacity ratio of surface area ratio of survival ratio of tea polyphenols to amino acids ratio of the circumference of a circle to its diameter ratio of transportation accident ratio of wool yield to liveweight ratio of yield point to plastic viscosity ratio paper ratio parameter ratio programming ratio resistor ratio scale ratio scaling ratio set ratios of juveniles in the catch ratio standards of DC voltage ratio statistic ratio test ratio transformation

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