NF A89-250-5*NF EN ISO 3834-5:2021 金屬材料熔焊的質(zhì)量要求 第5部分:聲明符合 ISO 3834-2、ISO 3834-3 或 ISO 3834-4 質(zhì)量要求所必需的文件
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