| |||
| 直接调频 | |||
|
direct frequency modulation : 4 phrases in 3 subjects |
| Information technology | 1 |
| Technology | 2 |
| Telecommunications | 1 |
| |||
| 直接调频 | |||
|
direct frequency modulation : 4 phrases in 3 subjects |
| Information technology | 1 |
| Technology | 2 |
| Telecommunications | 1 |