This does not mean that the material will rust, but that this mineral is part of its composition.
这不意味着该石材为会生锈，而是指其成份中含有氧化矿物质。
Product composition: the composition of a combination of organic acids, high concentrations of strong acid-based formula has a special role, effective way to remove all stubborn stains, rust stains.
产品成分： 由多种有机酸组成，采用高浓度配方具有特强酸化作用， 有效地清除各种顽固污渍，锈渍。
Soft soil in the offing with high moisture capacity and complex chemical composition will rust the metal pipeline.
金属管道在含水量大、化学成份复杂的近海软土中易发生锈蚀。
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