| 单词 | step-vein |
| 释义 | > as lemmasstep-vein step-vein n. (see quot. 1881). ΘΚΠ the world > the earth > minerals > mineral deposits > [noun] > vein > step- or fault-vein step-vein1881 fault-vein1886 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 182 Step-vein, a vein alternately cutting through the strata of country-rock, and running parallel with them. < as lemmas |
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