2015DIN EN ISO 16610-20:2015-12 Geometrical product specifications (GPS) - Filtration - Part 20: Linear profile filters: Basic concepts (ISO 16610-20:2015); German version EN ISO 16610-20:2015
2015DIN EN ISO 16610-20:2015 Geometrical product specifications (GPS) - Filtration - Part 20: Linear profile filters: Basic concepts (ISO 16610-20:2015); German version EN ISO 16610-20:2015
1970DIN EN ISO 16610-20 E:2012-10 Geometric Product Specification (GPS) Filtering Part 20: Linear Profile Filters: Basic Concepts (Draft)