 |
| |||
| duff (удобрение) | |||
| refuse coal | |||
| угольные отходы: 10 phrases in 4 subjects |
| Ecology | 1 |
| Energy industry | 5 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 3 |
|
| |||
| duff (удобрение) | |||
| refuse coal | |||
| угольные отходы: 10 phrases in 4 subjects |
| Ecology | 1 |
| Energy industry | 5 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 3 |