DIN EN ISO 21920-1:2020
几何产品规范(GPS) 表面纹理:轮廓 第1部分:表面纹理的指示(ISO/DIS 21920-1:2020)
Geometrical product specifications (GPS) - Surface texture: Profile - Part 1: Indication of surface texture (ISO/DIS 21920-1:2020); German and English version prEN ISO 21920-1:2020