Specification for AWS Certification of Resistance Welding Personnel
AWS电阻焊接人员认证规范

2011-01-01

Standard for AWS Certified Welders - Certification of Welders beginning in 1993 - also see QC3-89
AWS认证焊工标准——1993年开始的焊工认证——另见QC3-89

1993-01-01

Standard for the A WS Certification of Arc Welding Personnel
弧焊人员A WS认证标准

Standard Guide for Aircraft Certification Education Standards for Engineers and Professionals in Aerospace Industry
航空航天工业工程师和专业人员飞机认证教育标准的标准指南

2020-07-01