welding of spiral seam/welding of helical seam
... 环缝焊接girth welding/ circumferential 螺旋缝焊接welding of spiral seam/welding of helical seam 环缝对接焊butt welding of circumferential seam ...
基于10个网页-相关网页
... welding of transverse seam 横缝焊接 welding of spiral seam 螺旋缝焊接 Rail welding seam 钢轨焊缝 ...
基于1个网页-相关网页
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