| 单词 | straight coal |
| 释义 | > as lemmasstraight coal straight coal n. Mining (see quot.). ΘΚΠ society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > excavation with three sides left standing straight stall1860 straight coal1883 1883 W. S. Gresley Gloss. Terms Coal Mining 244 Straight coal, an excavation made in the Thick coal, having the solid coal left on three sides of it. < as lemmas |
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