短語詞組短語digital local switching 數(shù)字式市內交換service digital telephone switching 數(shù)字電話交換業(yè)務digital telephone switching 數(shù)字電話;數(shù)字程控交換機digital pc switching system 數(shù)字程控交換系統(tǒng)digital SPC switching equipment 數(shù)字程控交換設備Digital Data Switching Matrix 數(shù)字數(shù)據(jù)開關陣列digital data switching 數(shù)字數(shù)據(jù)交換digital SPC switching 數(shù)字程控交換digital telephone switching service 數(shù)字電話交換業(yè)務 返回 digital switch