单词 | Mac-Lane system |
释义 | Mac-Lane system [`mak `lān ´sis·tǝm] MINING ENGINEERING A means of conveying dirt to the top of a heap; an inclined rail track goes from the loading station at the bottom of the heap to an extending frame at the top; the rope that hauls the tubs with dirt up the rail track passes around a return sheave in the extending frame; a tub is tipped over at the top by a gear and the dirt discharged. |
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