| 单词 | main-and-tail |
| 释义 | > as lemmasmain-and-tail main-and-tail adj. Mining designating a single-track haulage system in which one rope (the main rope) is used to pull a set of loaded cars out of a mine, and a tail-rope is used to pull the empty cars back inside. ΚΠ 1912 F. D. Power Coalfields & Collieries Austral. xiv. 160 The skips are hauled in and out of the mine by a main and tail rope system. 1964 A. Nelson Dict. Mining 268 The main-and-tail haulage is adopted when the gradient is irregular and the empty set will not run inbye by gravity. 1988 S. C. Walker Mine Winding & Transport iii. 68 (caption) Fig. 3.5 shows principle of main and tail haulage system. < as lemmas |
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