preparatory workings造句

"preparatory workings"是什么意思

造句与例句手机版

A discussion on support classification of preparatory workings
采准巷道支护分级的探讨
Effect of soft rock controlled entirely on structural stability of preparatory workings , adjoining rock
控制软岩层对采准巷道围岩结构稳定的作用
It's difficult to see preparatory workings in a sentence. 用preparatory workings造句挺难的

相邻词汇

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