| 单词 | Knoop hardness (KH) |
| 释义 | Knoop hardness (KH)Definition Material hardness test in which the depth (and not the area) of indent caused by the impact of a highly polished and elongated pyramidical (pointed rhombohedral) diamond is measured. KH is expressed as a ratio of the applied force in kilograms and the depth of penetration in millimeters. |
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