美利体育登录入口官网:JIS Z 3422-1:2003 金属材料焊接程序规范及认可.焊接程序试验.第1部分:钢的电弧焊及气焊和镍及镍合金的电弧焊
Specification and approval of welding procedures for metallic materials -- Welding procedure tests -- Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys