digital telephone exchange 中文意思是什麼
digital telephone exchange
解釋
數字電話交換機-
Digital telephone exchange txd
數字電話交換機 -
Counties and cities have finished five projects of construction including local telephone net, divided into - group exchange net, digital date net, digital mobile communication net and newspapers - and - periodicals
17個縣市區已完成了本地電話網分組交換網數字數據網數字移動通訊網報刊發行微機網五項建設,全市有線無線交叉,模擬數字兼容,高中低檔並存,多功能多手段的現代先 -
Generic specification for stored program control digital private automatic branch telephone exchange system
程式控制數字用戶自動電話交換機通用技術條件
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