Coal Mining. An interval or interruption in a coal seam, where the strata above and below the seam meet.
| 单词 | θ6281 |
| 释义 | the world > the earth > minerals > mineral deposits > features of stratum or vein > [noun] > pinching (5) nip1817 Coal Mining. An interval or interruption in a coal seam, where the strata above and below the seam meet. want1854 Coal Mining. = nip, n.3 10. Now rare. Subcategories:— pinched place (3) |
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