lyklzy 发表于 2018-7-22 10:52:23

ISO 15612-2018 Specification and qualification of welding procedures for metalli

ISO 15612-2018  Specification and qualification of welding procedures for metallic materials - Qualification by adoption of a standard welding procedure specification



admin 发表于 2018-7-30 17:22:55

谢谢您的分享,金币已奖励!
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