DIN EN ISO 13919-2:2021 电子和激光束焊接接头. 缺陷质量等级的要求和建议. 第2部分: 铝,镁及其合金和纯铜(ISO 13919-2-2021); 德文版 EN ISO 13919-2-2021
Electron and laser-beam welded joints - Requirements and recommendations on quality levels for imperfections - Part 2: Aluminium, magnesium and their alloys and pure copper (ISO 13919-2:2021); German version EN ISO 13919-2:2021