PSDN

abbr.分组交换数字网(Packet Switched Digital Network); 分组交换数据网(Packet-Switched Data Network); 公共交换数据网(Public-Switched Data Network) 双语例句 Research on the Interworking of PSDN and ISDN 分组网与ISDN互连的研究 In order for all kinds of no-packet facsimile terminals to...

发布时间：2026-06-11 浏览量：0 psdn