 |
| |||
| frequency modulation noise | |||
| 调频噪声: 15 phrases in 7 subjects |
| Air defense | 9 |
| Aviation | 1 |
| Electronics | 1 |
| General | 1 |
| Geophysics | 1 |
| Radio | 1 |
| Space | 1 |
|
| |||
| frequency modulation noise | |||
| 调频噪声: 15 phrases in 7 subjects |
| Air defense | 9 |
| Aviation | 1 |
| Electronics | 1 |
| General | 1 |
| Geophysics | 1 |
| Radio | 1 |
| Space | 1 |