再加上钙，镁起着牙齿和骨骼硬度不可或缺的作用。
Together with calcium, magnesium plays an integral role in tooth and bone hardness.
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.
主要无机成分：钠，钾，氯，钙，镁，碱度，总硬度，总磷，氟化物，硫酸盐。
Major Inorganic Components: Sodium, potassium, chloride, calcium, magnesium, alkalinity, total hardness, total phosphorus, fluoride, sulphate.
白色粉末，有效络合硬水中的钙镁等金属离子，降低硬度，改变水质，使其更利于洗涤操作。
White powder, effective hard-water complex metal ions such as calcium and magnesium, lower hardness and change the water quality to make it more conducive to washing operation.
由此方法获得的阳极氧化膜光滑致密，硬度较高，能显著提高镁及镁合金的耐蚀性能。
The formed anodic oxide film is smooth and compact, has high hardness, and can increase magnesium and its alloy corrosion resistance.
由此方法获得的阳极氧化膜光滑致密，硬度较高，能显著提高镁及镁合金的耐蚀性能。
The formed anodic oxide film is smooth and compact, has high hardness, and can increase magnesium and its alloy corrosion resistance.
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