释义 |
DictionarySeenumberhardness number
hardness number[′härd·nəs ‚nəm·bər] (engineering) A number representing the relative hardness of a mineral, metal, or other material as determined by any of more than 30 different hardness tests. hardness number
hardness numberA number on a calibrated scale indicating the relative hardness as determined by a particular system of testing, e.g., Knoop, Mohs, Rockwell, Vickers hardness tests. A steel ball or diamond point is applied with a known variable load for a determined period of time to produce an indent whose depth or diameter can be measured. See also: numberLegalSeeNumber |