 |
| |||
| degradatie | |||
|
huononeminen : 5 phrases in 3 subjects |
| Communications | 3 |
| Earth sciences | 1 |
| Electronics | 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