This paper specifies the items of welding procedure qualification for butt joint of spliced head, ac

中文解释

本文按照凸形封头的成形加工工艺、封头材料种类,封头拼接焊接接头的焊接方法和焊后热处理类别,分别叙述封头拼接焊接接头的焊接工艺评定所需项目。

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