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单词 ball-mine
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ball-mine
ball-mine n. English regional Obsolete (in Staffordshire) ironstone found as fossiliferous nodules; cf. ballstone n.
ΘΚΠ
the world > the earth > minerals > ore > [noun] > metal ore > iron ore > specific shape
ball-mine1702
pipe ore1709
ball veina1728
kidney ore1750
1702 Philos. Trans. (Royal Soc.) 23 1072 A sort of Iron Stone, akin to that which they call in Staffordshire Ballmine.
a1728 J. Woodward Attempt Nat. Hist. Fossils Eng. (1729) ii. 14 These [ironstone nodules] perhaps differ not much from those..called Ball-Mine in Staffordshire.
extracted from balln.1
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