(perhaps) coal occurring in thick seams.
| 单词 | θ6577 |
| 释义 | the world > the earth > minerals > types of mineral > hydrocarbon minerals > [noun] > coal > coal in seams or benches (2) ore coal1603 (perhaps) coal occurring in thick seams. bench-coal1712 (a seam of) coal which is divided into layers by intervening material, typically shale or slate; esp. coal of this type found near the base of a… |
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