短語詞組短語seam diffusion welding 擴散縫焊seam -welding head 滾焊頭;縫焊焊頭longitudinal seam automatic welding 縱縫自動焊seam explosive welding 線狀爆炸焊接parallel seam resistance welding equipment 并列縫合電阻縫焊裝置 返回 seam welding