| 单词 | riband coal |
| 释义 | > as lemmasriband coal ΚΠ 1796 R. Kirwan Elements Mineral. (ed. 2) II. 56 Fifth Variety [of coal] from Irwine.., black, presents layers in contrary directions, hence often called Riband Coal. 1861 E. Hull Coal-fields of Great Brit. (ed. 2) ii. ii. 81/2 (table) Riband-coal. < as lemmas |
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