 |
| |||
| procedures for environmental protection | |||
| мероприятия по защите окружающей среды: 5 phrases in 5 subjects |
| Aviation medicine | 1 |
| Ecology | 1 |
| Energy industry | 1 |
| Hydraulic engineering | 1 |
| Oil and gas technology | 1 |
|
| |||
| procedures for environmental protection | |||
| мероприятия по защите окружающей среды: 5 phrases in 5 subjects |
| Aviation medicine | 1 |
| Ecology | 1 |
| Energy industry | 1 |
| Hydraulic engineering | 1 |
| Oil and gas technology | 1 |