柯林斯詞典Brinell hardness number /br??n?l/ 1. N 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 勃氏硬度數(shù) 返回 brinell hardness number