scale of hardness

• 硬度等级,硬度计,硬度标尺,硬度标,硬度表

scale of hardness的用法和样例：

例句

1. This scale is based on the relative abrasiveness of minerals.
   此硬度计的依据是矿物的相对研磨能力。
2. The ultrasonic hardness tester is an versatile nondestructive tester.
   超声硬度计是一种普适的无损测试仪器。