| hard water |
water containing a high level of calcium, magnesium, and other minerals. Hard water reduces the cleansing power of soap and produces scale in hot water lines and appliances.
출처: www.aquatechnologies.com/info_glossary.htm
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| hard water |
Water that contains certain salts, such as those of calcium or magnesium, which form insoluble deposits in boilers and form precipitates with soap.
출처: www.corrosionsource.com/handbook/glossary/h_glos.h...
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| hard water |
Water containing excessive amounts of calcium and magnesium ions which prevents soap from lathering and produces scale and incrustation.
출처: ag.arizona.edu/waterquality/YouthActivityPages/Glo...
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| hard water |
출처: www.airwaterice.com/category/z.8/
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