DIN EN ISO 3834-5 E:2014-02 金属材料的熔焊质量要求 第5部分:有必要声明和ISO 3834-2、 ISO 3834-3或ISO 3834-4质量要求一致的文件(草案)
Welding quality requirements for metallic materials Part 5: Documents (draft) stating the need to be consistent with the quality requirements of ISO 3834-2, ISO 3834-3 or ISO 3834-4