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
- iron sulfate
- iron sulfate heptahydrate
- iron sulfides
- iron-sulfur centre
- iron-sulfur protein
- iron sword in Spring and Autumn Period,Lingtai
- Iron Sword with Jade Handle of Guo State
- iron telluride
- iron triangle
- iron trichloride
- Iron Weapons from Han Dynasty Tomb at Mancheng
- Iron Weight of the Wuping Reign
- irony
- iron(Ⅱ,Ⅲ) oxide
- Iroquois
- IRPA
- IRPS
- IRR
- irradiance
- irradiance of Lambert source
- irradiance of point source
- irradiant
- irradiate
- irradiation
- irradiation as a phytosanitary treatment