| 单词 | yard-seam |
| 释义 | > as lemmasyard-seam yard-seam n. = yard-coal n. ΘΚΠ the world > the earth > minerals > mineral deposits > [noun] > stratum or bed > of coal > type of coal seam foot coal1665 foot-rid1665 top coal1803 ten-yard coal1839 rider1840 ten-foot coal1855 top-hard1855 yard-coal1855 yard-seam1862 guide seam1867 main1867 bank1881 rearer1883 thick coal1883 thick seam1883 thin seam1883 1862 Times 21 Jan. Strong active relays of pitmen and miners can soon clear the shaft from the yard-seam. < as lemmas |
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