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304不锈钢管道焊接事需要充氩气吗？
小管道不能进行焊条手弧焊时，要用氩弧打底焊。打底时，没有氩气保护是不能保证质量的。但要看怎么保护了，整个管道都充氩气是不现实的。可以用一人氩弧焊，一人进行保护的方法。