| 1. | The precision synchronizing clock system based on gps
技术的分布式授时同步时钟 |
| 2. | Geophysics , time and port meteorological services
地球物理授时及海港气象服务 |
| 3. | Gps glonass timing synchronization survey antenna
Gps glonass授时测量天线 |
| 4. | Geophysics , astronomy and time services
地球物理天文及授时服务 |
| 5. | Information on time service and astronomy
授时服务及天文资料 |
| 6. | History of hong kong time service
香港授时服务历史 |
| 7. | Basic terms in time service
授时服务基本术语 |
| 8. | Seismology , time astronomy
地震授时及天文 |
| 9. | The hong kong time service
香港授时服务 |
| 10. | Time service and astronomy
授时及天文 |
