 |
| |||
| 频带宽度 | |||
|
frequency width : 15 phrases in 8 subjects |
| Air defense | 2 |
| Bridge construction | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| Otorhinolaryngology | 1 |
| Space | 3 |
| Technology | 3 |
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