短語詞組短語telephone lock exchange center 電話當?shù)亟粨Q中心telephone local exchange center 電話局部交換中心conference telephone tandem exchange 議電話匯接機telephone e exchange 電話局telephone teletypewriter exchange 電話電傳電報交換機private video telephone branch exchange 專用可視電話小交換機automatic telephone exchange [通信]自動電話交換局;[通信]自動電話交換機;程控電話;自動capacity of telephone exchange 電話局容量digital telephone exchange 數(shù)字電話交換局;數(shù)字電話交換機;數(shù)字 返回 telephone exchange