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四氧化三铁
chem. magnetic oxide; magnetic iron oxide
el. ferriferrous oxide; ferric oxide
met. black iron oxide; black of iron; ferroferric oxide (FeO•Fe2O3); ferrosoferric oxide (Fe3O4)
oil ferroferric oxide
space ferriferous oxide
tech. iron oxide black; magnetic iron ore; magnetite black
四 氧化三铁
: 1 phrase in 1 subject
Technology1

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