 |
| |||
| educational development (ssn) | |||
| развитие системы образования: 5 phrases in 5 subjects |
| Astronautics | 1 |
| Ecology | 1 |
| Energy industry | 1 |
| General | 1 |
| Water supply | 1 |
|
| |||
| educational development (ssn) | |||
| развитие системы образования: 5 phrases in 5 subjects |
| Astronautics | 1 |
| Ecology | 1 |
| Energy industry | 1 |
| General | 1 |
| Water supply | 1 |