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muroran-it.ac.jp金属の原料となる鉱石の化学状態 そのほかに… Cr:クロム鉄鉱(FeCr2O4) Ni :硫鉄ニッケル鉱((Fe,Ni)9S8) Mg:菱苦土石(MgCO3)、苦灰石(CaMg(CO3)2)
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