upward vertical position welding
... 双面立焊 two-operator vertical welding 向上立焊 upward vertical position welding; vertical up welding/upward welding in the vertical position; vertical upward welding 上行立焊焊缝 upward weld ...
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upward vertical position welding
垂直向上焊接
以上为机器翻译结果，长、整句建议使用 人工翻译 。