| 1. | Automatic switch operation control system based on at89c
51的刀闸自动操作控制系统 |
| 2. | Automatic switching equipment , automatic control equipment
自动开闭?电装置 |
| 3. | Ringing and tone for telephone automatic switching network
电话自动交换网铃流和信号音 |
| 4. | Automatic switching of output polarity
输出极性自动切换功能 |
| 5. | Automatic switching technology of power and its development orientation
电源自动切换技术及其发展方向 |
| 6. | Subscriber line signaling system for telephone automatic switching network
电话自动交换网用户信号方式 |
| 7. | Trainer for trouble shooting of pump s automatic switching system
泵浦自动切换系统故障诊断与排除训练器 |
| 8. | Private automatic switching system
私用自动交换系统 |
| 9. | Development of an automatic switch device fordouble power of single - phase source
单相双电源自动切换装置的研制 |
| 10. | Automatic switching between bands
自动切换波段 |
