... OP Magnetic 铁钴氧化物烧结磁铁 【航海航天词汇】 colcothar 铁丹; 褐式色铁氧化物 【航海航天词汇】 magnetite 磁铁矿; 四氧化三铁锈层 【石油词汇】 ...
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N a finely powdered form of ferric oxide produced by heating ferric sulphate and used as a pigment and as jewellers' rouge 铁丹 (Also called crocus)
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