... rolling seam weld 滚焊焊缝 butt seam weld 对线焊 ultrasonic seam weld 超声波缝焊 ...
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butt seam weld 对接滚焊焊缝...
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butt weld seam 对接缝
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According to the different product structure, butt fusion welding process and lap seam welding process are used to respectively weld left and right half shell of upper body.
上体左、右半壳直焊缝视产品结构不同，分别采用对接熔化焊和搭接缝焊工艺。
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