specification and qualification of welding procedures for metallic materials-welding procedure specification-resistance welding 金属材料的焊接程序规范和合格鉴定.焊接程序规范.电阻焊接
specification and qualification of welding procedures for metallic materials-welding procedure specification-laser beam welding 金属材料焊接程序的规范和合格鉴定.焊接程序规范.激光束焊接
specification and qualification of welding procedures for metallic materials-welding procedure specification-part 1 : arc welding 金属材料的焊接程序规范和鉴定.焊接程序规范.第1部分:弧焊
specification and qualification of welding procedures for metallic materials-welding procedure specification-part 2 : gas welding 金属材料焊接程序的规范和鉴定.焊接程序规范.第2部分:气焊
specification and qualification of welding procedures for metallic materials-welding procedure specification-electron beam welding 金属材料焊接程序的规范和合格评定.焊接程序规范.电子束焊