| |||
| 声音信号调制 | |||
| 声音调制 | |||
| 声频调制 | |||
| 音频调制 | |||
|
audio modulation : 6 phrases in 5 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Multimedia | 1 |
| |||
| 声音信号调制 | |||
| 声音调制 | |||
| 声频调制 | |||
| 音频调制 | |||
|
audio modulation : 6 phrases in 5 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Multimedia | 1 |