 |
| |||
| alternating impact | |||
| знакопеременное воздействие: 5 phrases in 4 subjects |
| Astronautics | 1 |
| Bridge construction | 1 |
| Construction | 1 |
| Seismology | 2 |
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