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单词 manganese mine
释义

> as lemmas

manganese mine
manganese mine n.
ΚΠ
1839 Penny Cycl. XIV. 381/1 It occurs in Devonshire, Cornwall, in the Harz, and most manganese mines.
1961 Current Sci. 30 223/1 (heading) Some observations on piedmontite from Goldongri Manganese Mine.
extracted from manganesen.
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as lemmas
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