| hardness |
A measure of the amount of calcium and magnesium salts in water. Usually expressed as grains per gallon or ppm as CaCO3.
출처: www.cleaver-brooks.com/GlossFP.html
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| hard palate |
The front part of the roof of the mouth containing bone covered by mucosa (pink "skin")
출처: www.pierrerobin.org/glossaryal.html
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| hard water |
Water which contains calcium or magnesium in an amount which require an excessive amount of soap to form a lather.
출처: www.cleaver-brooks.com/GlossFP.html
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| hardness test |
Techniques used to measure the degree of hardness of heat-treated materials.
출처: www.ticms.com/wizard/glossary.htm
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| hard water |
such water than contains dissolved salts of calcium and magnesium in a concentration greater than 200 ppm.
출처: guppyplace.tripod.com/Glossary.html
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