| 单词 | main rope |
| 释义 | > as lemmasmain rope main rope n. Mining a rope which hauls a train of full wagons from the working face to the pit bottom (cf. tail-rope n. 2c and main-and-tail adj.). ΚΠ 1876 G. G. André Pract. Treat. Coal Mining II. viii. 376 The train of loaded tubs is thus drawn towards the shaft by the main rope, which at the same time pulls out the tail rope from the other drum. 1900 Engin. Mag. 19 724 A main rope which pulls the full trams out, and a tail rope which tails after the full trams, and which then becomes the haulage rope to pull out the empty trams. 1988 S. C. Walker Mine Winding & Transport iii. 67 Main rope haulage... The use of this system..is restricted to operation on gradients sufficient to pull the empty cars and the single rope down the in line, power being only required to haul full cars up. < as lemmas |
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