| |||
| осадок сточных вод (Alexander Demidov) | |||
|
effluent sludge : 4 phrases in 3 subjects |
| Ecology | 2 |
| Energy industry | 1 |
| Hydraulic engineering | 1 |
| |||
| осадок сточных вод (Alexander Demidov) | |||
|
effluent sludge : 4 phrases in 3 subjects |
| Ecology | 2 |
| Energy industry | 1 |
| Hydraulic engineering | 1 |