美利体育登录入口官网:LVS EN ISO 13919-2:2021 电子束和激光束焊连接 关于缺陷的质量等级要求和建议 第2部分:铝、镁及其合金和纯铜(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)