“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	relaxation time of Brownian movement relaxation time sensing relaxation training relaxation vibration relaxation with projection relaxed relaxed circular DNA relaxed cluster relaxed consistency model relaxed DNA relaxed limit relaxed optimal control relaxed optimal regime relaxed plasmid relaxin relaxing period relaxing the fingers and collapsing the wrist relaxor relay relay channel relay condenser relay-contact circuit relay-contact network relay-contact scheme relay control

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