短語詞組短語overhead contact line 架空接觸網;架空接觸線overhead transmission line [電]架空輸電線;架空送電線路;架空輸電線路;架空線路overhead insulated line 架空絕緣線路UHV overhead transmission line 特高壓架空輸電線路overhead reflux line 架空廻流線overhead transmission line sag 架線弧垂overhead connect line parts 接觸網零部件overhead ground line 架空避雷線overhead telecommunication line 架空電訊線路overhead warning line 攔河線 返回 overhead line