| 单词 | working drift |
| 释义 | > as lemmasworking drift working drift n. Mining a drift or horizontal passage in which mining or excavation is being carried out; cf. drift n. 15. ΚΠ 1835 J. Holland Hist. & Descr. Fossil Fuel, Collieries, & Coal Trade xi. 218 The air descends into..working drift. 1911 Pop. Sci. Monthly Nov. 429 At the McDonald mine on the Controller Bay group is a working drift more than 600 feet long. 2003 K. Satai et al. in T. Saito & S. Murata Environmental Rock Engin. ii. 173/2 Kammon tunnel has two main tunnels as well as a working drift. < as lemmas |
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