| 1. | Ringing and tone for telephone automatic switching network
电话自动交换网铃流和信号音 |
| 2. | Processor , attached support asp
附加辅助自动交换板的处理机 |
| 3. | Subscriber line signaling system for telephone automatic switching network
电话自动交换网用户信号方式 |
| 4. | Pabx private automaatic branch exchange
私用自动交换分机 |
| 5. | Private automatic switching system
私用自动交换系统 |
| 6. | Earliest community automatic exchange network installed in wisconsin
威斯康星州首次安装社区自动交换局网络。 |
| 7. | Development on ventilation automatism changer in high gas excavation face
高瓦斯掘进工作面通风方式自动交换器的研制 |
| 8. | Automatic switching equipment
自动交换设备 |
| 9. | Multi frequency register signaling system for telephone automatic switching network
电话自动交换网多频记发器信号方式 |
| 10. | Center , antomatic - switching
自动交换中心 |
