网络与数据通信 有线网络 释文 data service unit/channel service unit, DSU/CSU 数据服务单元/通道服务单元
- IR
- Ir
- ir-
- Ir-192 radiation source
- IRA
- IRAF
- Iraklii Abashidze
- IRAM
- Iran Bastan Museum
- Iran-Contra Affair
- Iranian
- Iranian Art/Persian Art
- Iranian Modern Literature
- Iranian music
- Iranian Revolution
- Iranians
- Iran-Iraq War
- Iran Islamic Museum
- Iran Tobacco Movement
- Iraqi Drama
- Iraqi music
- Iraqi Revolution
- Iraqi Uprising
- Iraq Makam
- Iraq Petroleum Company