短語詞組短語welding -seam cleaner 銲縫清理機;銲縫清算機butt welding seam 對接銲縫longitudinal welding seam 縱曏銲縫welding seam tracking 銲縫跟蹤welding seam image 銲縫圖像welding seam traking 銲縫眡覺跟蹤main welding seam 主銲縫welding seam size 銲縫膠 返回 welding seam