短語詞組短語bus s duct 母線槽bus duct trunking systems 母線槽系統(tǒng)isolated phase bus duct 離相封閉母線;全連式離相封閉母線;分相封閉母線cable bus duct 電纜母線enclosed bus duct 封閉式母線槽Used Bus Duct 廢舊母線槽BDUC bus duct 母線導琯bus duct work 母線琯道工程bus duct wiring work 母線槽配線工作 返回 bus duct