hardness number

基本解释

Grain number and hardness of Ta disk changed from center to edge;
晶粒数和硬度沿钽饼中心到边沿变化；
Because the hardness number obtained depends on the applied load, Knoop test restless should always cite the load used.
因为硬度值的获得和载荷十分密切，所以不太精确的努氏试验总是采用用过的载荷值。
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The hardness number is then read on a dial on the machine. The Rockwell test is very quick, and is suitable FOR mass inspection of parts.
然后在硬度计的刻度盘上读出硬度数值。洛氏硬度计测试非常快捷，并且适用于部件的成批检验。