butt welding of circumferential seam
butt welding of circumferential seam 环缝对接焊 butt-seam welding machine 对接缝焊机; 对接滚焊机 circular seam welding 环缝对接焊; 环缝焊接 .
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... chipping 铲除表面缺陷 circular seam welding 环缝对接焊 circular weld 环焊缝 ...
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短语
环缝对焊接
butt welding of circumferential seam
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