| 单词 | thin coal |
| 释义 | > as lemmasthin coal thin coal n. coal found in shallow beds or seams: cf. thick coal n. at thick adj. and n. Compounds 2b. ΚΠ 1855 J. Phillips Man. Geol. 188 Strata and thin coals. 1900 Engin. Mag. 19 717 In days gone by thin seams were worked by special thin coal miners. < as lemmas |
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