2022DIN EN ISO 21920-1:2022-12 Geometrical product specifications (GPS) - Surface texture: Profile - Part 1: Indication of surface texture (ISO 21920-1:2021); German version EN ISO 21920-1:2022
2022DIN EN ISO 21920-1:2022 Geometrical product specifications (GPS) - Surface texture: Profile - Part 1: Indication of surface texture (ISO 21920-1:2021)
2020DIN EN ISO 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