... laser-welding mac你好ne激光烧焊器 multiple arc weld多弧焊缝 hydraulic weld process液压烧焊法 ...
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multiple-electrode submerged arc weld 多电极埋弧焊
multiple electrode submerged arc weld 多电极埋弧焊
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The etched section also reveals that multiple weld passes were made over the top of the original submerged arc weld pass.
从酸蚀断面还可以看出：在原自动埋弧焊的上面覆盖有多层焊道。
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