涂膜硬度 meaning in English

film hardness

Standard test method for film hardness by pencil test
铅笔试验法测定涂膜硬度的标准试验方法
Determination of film hardness by pencil test
涂膜硬度铅笔测定法
Methods of test for paints - determination of film hardness by pencil test
涂料的试验方法.通过铅笔试验对涂膜硬度的测定
Hardness pencil a tool used to evaluate the hardness of a cured paint film
铅笔硬度?一种用来评价固化后涂膜硬度的硬度的工具。