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  机译： 气保弧焊制造螺旋焊钢管的方法

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  机译： 钢管的制造方法，在惰性气氛中，通过电弧焊的过程，焊接持续螺旋状

• 5. GAS SHIELD ARC WELDING METHOD AND STEEL PIPE MANUFACTURING METHOD [P] . WO2021205858A1 . 2021-10-14

  机译： 气体屏蔽电弧焊接方法和钢管制造方法

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