青云翻译

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Connector requires full penetration Groove welds, if not opposite plate welding before Qing dynasty had a defect-free metals before welding.

The attachment requests the entire penetration the bevel to weld, after if does not use the backing strip then reverse side Shi Hanqian should the square corner reveal the non-flaw the metal to execute again first welds.

正在翻译，请等待...

Connector requires full penetration Groove welds, if not opposite plate welding before Qing dynasty had a defect-free metals before welding.