管理学 电子政务网络技术 释 integrated services digital network; ISDN 综合业务数字网 实现话音、数据和图像在同一个网络中传输与交换的重要技术，是一种典型的电路交换网络系统。
网络与数据通信 协议体系与组成结构 释文 integrated service digital network, ISDN 综合业务数字网
- historical document film
- Historical Documents of Ming and Qing Dynasties
- historical drama
- historical epidemiology of COVID-19
- historical epistemology
- historical ethnic geography
- historical evaluation
- Historical Evaluations and Judgments
- historical events
- Historical Events in Their Entirety: A Rearrangement of Zizhi Tongjian
- Historical Events in Their Entirety,block-printed edition by Yanlingjunzhai,second year of Chunxi era,Song Dynasty
- historical evidence
- historical evolutionism
- Historical Excerpts
- historical exhibition
- historical explanation
- historical facts
- historical fatalism
- Historical figures of water science and technology in China
- historical f ilm
- historical geographical names
- historical geography
- historical geography information system
- historical geomorphology
- historical idealism