| |||
| 频率码; 频率电码 | |||
|
frequency code : 44 phrases in 11 subjects |
| Air defense | 1 |
| Artificial intelligence | 1 |
| Automobiles | 4 |
| Aviation | 3 |
| Communications | 2 |
| Electronics | 13 |
| Geophysics | 1 |
| Information technology | 2 |
| Space | 5 |
| Technology | 5 |
| Telecommunications | 7 |
| |||
| 频率码; 频率电码 | |||
|
frequency code : 44 phrases in 11 subjects |
| Air defense | 1 |
| Artificial intelligence | 1 |
| Automobiles | 4 |
| Aviation | 3 |
| Communications | 2 |
| Electronics | 13 |
| Geophysics | 1 |
| Information technology | 2 |
| Space | 5 |
| Technology | 5 |
| Telecommunications | 7 |