充氮除非要焊,不然没有必要吧。 抽真空是必要的。100多刀买个真空泵就可以。自己可以做。仙逝的阎大侠是专家。
本帖于 2021-03-05 07:03:29 时间, 由普通用户 PrimeryColor 编辑
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