| hard water |
Water which has a high concentration of dissolved minerals and solids.
출처: www.aquahobby.com/articles/e_glossary.php
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| hard water |
Natural water containing impurities in various proportions. Traditional hardness is a measure of calcium or dissolved solids in a solution, measured in parts per million. Hard water generally ranges from 100 to 250 ppm.
출처: www.alpha-plumbing.com/plumbing-terminology-h.htm
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| hard water |
Water containing soluble salts of calcium and magnesium and sometimes iron.
출처: www.howtocleananything.com/hca_glossay.htm
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| hard water |
Water that is difficult to make soap suds in because it contains calcium and magnesium salts.
출처: www.education.melbournewater.com.au/content/glossa...
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| hard water |
Water with a total hardness of one grain per gallon or more, as calcium carbonate equivalent.
출처: www.advancedh2o.com/technical/glossary_ghi.html
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