direct current arc welding
... direct current amplifier: 直僚大器,直流放大器 direct current arc welding: 直流电弧焊 direct current generator: 直流发动机 ...
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It will produce magnetic field due to affection by direct current welding power supply during the welding of spiral submerged arc welded pipe. It will still remain residual magnetic.
螺旋埋弧焊钢管焊接过程中因直流焊接电源的影响会产生磁场，焊接结束后仍有剩磁存在。
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