Specification and qualification of welding procedures for metallic materials - welding procedure test - hyperbaric dry welding 金属材料焊接程序的规范和鉴定.焊接程序试验.高压干焊
Specification and qualification of welding procedures for metallic materials - welding procedure test - electron and laser beam welding 金属材料焊接程序的规范和合格鉴定.焊接程序试验.电子和激光束焊接
Specification and qualification of welding procedures for metallic materials - welding procedure test - spot , seam and projection welding 金属材料焊接程序的规范和合格鉴定.焊接程序试验.点焊缝焊和凸焊
Specification and qualification of welding procedures for metallic materials - welding procedure test - resistance butt and flash welding 金属材料焊接程序的规范和鉴定.焊接程序试验.电阻对接焊和电弧对接焊
Specification and qualification of welding procedures for metallic materials - welding procedure test - welding of tubes to tube - plate joints 金属材料焊接程序的规范和合格鉴定.焊接程序试验.管对管焊接.平板接合