 |
| |||
| повторное использование сточных вод | |||
| recycling of water: 10 phrases in 5 subjects |
| Ecology | 5 |
| Energy industry | 2 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Water supply | 1 |
|
| |||
| повторное использование сточных вод | |||
| recycling of water: 10 phrases in 5 subjects |
| Ecology | 5 |
| Energy industry | 2 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Water supply | 1 |