| 单词 | fissure vein |
| 释义 | > as lemmasfissure vein fissure vein n. (see quots.). ΚΠ 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 133 Fissure-vein, a fissure in the earth's crust filled with mineral. 1886 York Herald 4 Aug. 1/4 As usual in such fissure veins..as the workings increase in depth the lode will considerably increase both in thickness and richness. < as lemmas |
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