 |
| |||
| 雷达和电视辅助导航 | |||
| radar and television aid navigation: 10 phrases in 6 subjects |
| Air defense | 2 |
| Electronics | 1 |
| General | 1 |
| Geophysics | 2 |
| Space | 1 |
| Technology | 3 |
|
| |||
| 雷达和电视辅助导航 | |||
| radar and television aid navigation: 10 phrases in 6 subjects |
| Air defense | 2 |
| Electronics | 1 |
| General | 1 |
| Geophysics | 2 |
| Space | 1 |
| Technology | 3 |