主要是由钙镁的硫酸盐、氯化物和硝酸盐等盐类所形成的硬度。

Is mainly composed of calcium magnesium sulfate, chloride and nitrate as the hardness of the form salts.

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主要是由钙镁的硫酸盐、氯化物和硝酸盐等盐类所形成的硬度。

Is mainly composed of calcium magnesium sulfate, chloride and nitrate as the hardness of the form salts.

youdao