短语词组短語weld bridge seam 橋接銲縫;搭橋銲縫;建橋銲縫weld -seam heat-treatment 銲縫熱処理longitudinal weld longitudinal seam 縱曏銲縫bridge weld seam 蓋板銲縫of longitudinal weld seam 經曏錯皮weld seam metal 銲縫金屬weld seam detecting 銲縫檢查 返回 weld seam