The water was reacting with the ferrous iron in the tank.
水箱中的铁质产生化学反应。
Ferrous metals are those which contain iron.
黑色金属是含铁的金属。
Ferrous alloys are those in which the base or primacy metal is iron...
含铁类合金中的基本或主要金属是铁质。
Answer: the ferrous oxide iron quality score than big.
答：氧化亚铁含铁质量分数比大。
Answer: the ferrous oxide iron quality score than big.
答：氧化亚铁含铁质量分数比大。
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