DIN EN 1011-7:2004 Welding - Recommendations for welding of metallic materials - Part 7: Electron beam welding; German version EN 1011-7:2004
DIN EN ISO 1302:2002-06 Geometrical Product Specifications (GPS) - Indication of surface texture in technical product documentation (ISO 1302:2002); German version EN ISO 1302:2002