短語詞組短語dial telephone exchange 自動電話交換機panel l dial exchange 升降制自動交換機rural community dial exchange 農(nóng)村集團自動交換局electronic dial exchange 電子式撥號交換機;電子式自動交換機panel dial exchange 升降制自動交換機dial exchange area [通信]自動電話區(qū)dial private branch exchange 專用自動電話局telegraph dial exchange 電報撥號交換機electronic conductivity control dial exchange 電子式撥號交換 返回 dial exchange