 |
| |||
| voice frequency channel | |||
| voice circuit | |||
| audio-circuit | |||
| audio circuit | |||
| voice-frequency circuit | |||
|
音频电路 : 20 phrases in 9 subjects |
| Advertising | 1 |
| Communications | 1 |
| Electronics | 4 |
| General | 2 |
| Information technology | 4 |
| Project management | 1 |
| Rail transport | 3 |
| Technology | 3 |
| Telecommunications | 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