 |
| |||
| вторичное горное давление; давление кровли | |||
| roof weight: 13 phrases in 3 subjects |
| General | 2 |
| Geology | 3 |
| Makarov | 8 |
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