 |
| |||
| frequency shift system | |||
| 移频制: 44 phrases in 11 subjects |
| Air defense | 3 |
| Aviation | 1 |
| Electronics | 14 |
| Geophysics | 2 |
| Information technology | 4 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 9 |
| Technology | 3 |
| Telecommunications | 4 |
| Transport | 1 |
|
| |||
| frequency shift system | |||
| 移频制: 44 phrases in 11 subjects |
| Air defense | 3 |
| Aviation | 1 |
| Electronics | 14 |
| Geophysics | 2 |
| Information technology | 4 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 9 |
| Technology | 3 |
| Telecommunications | 4 |
| Transport | 1 |