NF A87-013-1*NF EN ISO 9692-1:2013 焊接和相关工艺 接头预处理的推荐方法 第1部分:钢的手工金属电弧焊接、气体保护金属弧焊、气焊、TIG焊接和束焊
Welding and allied processes - Types of joint preparation - Part 1 : manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels