“haulage level”的概念、定义、翻译、参考文献-科学参考

单词	haulage level
释义	haulage level [`hȯl·ij ´lev·ǝl] ^{MINING ENGINEERING} An underground level, either along and inside the ore body or closely parallel to it, and usually in the footwall, in which mineral is loaded into trams and moved out to the hoisting shaft.
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