| |||
| 扫描频率发生器 | |||
|
sweep- frequency generator : 8 phrases in 4 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Technology | 4 |
| Telecommunications | 2 |
| |||
| 扫描频率发生器 | |||
|
sweep- frequency generator : 8 phrases in 4 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Technology | 4 |
| Telecommunications | 2 |