2020DIN EN ISO 20028-1:2020-02 Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1: Designation system and basis for specification (ISO 20028-1:2019); German version EN ISO 20028-1:2019
2017DIN EN ISO 20028-1:2017 Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 20028-1:2017); German version EN ISO 20028-1:2017