美利体育登录入口官网:EN ISO 3834-5:2021
金属材料熔焊的质量要求.第5部分:声称符合ISO 3834.2,ISO 3834.3或ISO 3834.4质量要求的本身符合必要要求的文件
Quality requirements for fusion welding of metallic materials - Part 5: Documents with which it is necessary to conform to claim conformity to the quality requirements of ISO 3834-2, ISO 3834-3 or ISO 3834-4 (ISO 3834-5:2021)