| hardness |
The resistance to surface indentation usually measured by the depth of penetration (or arbitrary units related to the depth of penetration) of a blunt point under a given load using a particular instrument according to a prescribed procedure.
출처: www.fibreglast.com/contentpages-glossary+of+terms+...
|
|---|---|
| hardness |
The hardness of water is equal to the concentration of dissolved calcium and magnesium ions. Usually expressed as ppm of (CaCO 3 ).
출처: www.howtobrew.com/glossary.html
|
| hardening |
The hardening of steel is accomplished by heating the metal to cherry red and quickly quenching it in brine, water, or oil, depending on the alloy or application.
출처: faculty.uwstout.edu/hunts/art415002/glossary.shtml
|
| hard water |
Water which has a high concentration of dissolved minerals and solids.
출처: www.aquahobby.com/articles/e_glossary.php
|
| 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
|
| HARD | any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles |
|---|---|
| HARD | having been paved |
| HARD | of persons |
| HARD | a book with cardboard or cloth or leather covers |
| HARD | having a hard back or cover |
| HARD | having a hard back or cover |
| HARD | a British sweet made with molasses and butter and almonds |
| HARD | baseball as distinguished from softball |
| HARD | a no-nonsense attitude in business or politics |
| HARD | a cheap hard material made from wood chips that are pressed together and bound with synthetic resin |
| HARD | having a hard back or cover |
| HARD | extremely explicit |