 |
| |||
| voice frequency | |||
| super low frequency; ultra low frequency | |||
| ultralow frequency | |||
| ultra-low frequency | |||
|
特 低 频 : 13 phrases in 5 subjects |
| Air defense | 1 |
| Aviation | 4 |
| Electronics | 5 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Technology | 1 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips