磁鉄鉱

じてっこう

• magnetite; lodestone; loadstone n

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鉱区

こうく

• mining area; mine lot n

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銅鉱

どうこう

• copper ore n

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黄銅鉱

おうどうこう

• copper pyrites; fool's gold; chalcopyrite n

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溶鉱炉

ようこうろ

• smelting furnace; blast furnace n

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