标准摘要
[中文适用范围]： 本文件定义了车间和现场安装现场金属材料熔焊的基本质量要求。 [外文原描述]： This document defines elementary quality requirements for fusion welding of metallic materials both in workshops and at field installation sites.
英文名称Quality requirements for fusion welding of metallic materials — Part 4: Elementary quality requirements