 |
| |||
| коэффициент звукопоглощения | |||
| sound coefficient: 25 phrases in 7 subjects |
| Aviation | 3 |
| Ecology | 3 |
| Electronics | 8 |
| Makarov | 3 |
| Navigation | 1 |
| Occupational health & safety | 1 |
| Technology | 6 |
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