| 1. | 5 . a specially designed circuit switch is on the phone 7 .特设手持麦克风开关消除噪声电路 |
| 2. | Circuit switched public data network , cspdn 电路交换公用数据网 |
| 3. | Circuit switched data network , csdn 电路交换数据网 |
| 4. | Circuit switching exchange 电路交换的交换局 |
| 5. | Csm circuit switching mode 电路交换模式 |
| 6. | Csd circuit switched data 电路交换数据 |
| 7. | Circuit switching system 回路交换方式 |
| 8. | Circuit switching delays 电路交换延迟 |
| 9. | Circuit switching network 回路交换网 |
| 10. | Printed - circuit switch 印刷电路开开 |