短語詞組短語double butt strap seam 雙襯板對接縫butt welding seam 對接焊縫mitred butt welded seam 斜對接焊縫butt welded seam 對焊縫butt weld seam 對接縫butt welds seam 對接焊縫resistance butt -seam welding [電]電阻對縫焊接butt -seam-welding 對縫焊 返回 butt seam