| 释义 |
Mac-Lane system Mac-Lane system[′mak ′lān ‚sis·təm] (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. |