... 返修焊rewelding 向上立焊vertical up welding 向下立焊vertical down welding ...
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... 变速送丝 alternate wire-feed system 立向上焊 Vertical up welding 电弧静特性 Static characteristic of arc ...
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... rewelding 向上立焊 vertical up welding 向下立焊 vertical down welding 平焊（俯焊） ...
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