| 单词 | Brinell hardness number |
| 释义 | Brinell hardness number(brɪˈnɛl) noun a measure of the hardness of a material obtained by pressing a hard steel ball into its surface; it is expressed as the ratio of the load on the ball in kilograms to the area of the depression made by the ball in square millimetres Word origin C19: named after Johann A. Brinell (1849–1925), Swedish engineer |
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