擦硬度 meaning in English

scratching hardness

Testing methods for paints - part 5 : mechanical property of film - section 4 : scratch hardness pencil method erratum 2
涂料试验方法.第5部分:薄膜的机械特性.第4节:刮擦硬度
Testing methods for paints - part 5 : mechanical property of film - section 5 : scratch hardness stylus method erratum 1
涂料试验方法:第5部分:薄膜的机械特性.第5节:刮擦硬度