 |
| |||
| décantation des eaux usées; éclaircissement des eaux usées | |||
| clarification des eaux usées | |||
| отстаивание сточных вод: 6 phrases in 3 subjects |
| Construction | 2 |
| Forestry | 1 |
| Natural resourses and wildlife conservation | 3 |
|
| |||
| décantation des eaux usées; éclaircissement des eaux usées | |||
| clarification des eaux usées | |||
| отстаивание сточных вод: 6 phrases in 3 subjects |
| Construction | 2 |
| Forestry | 1 |
| Natural resourses and wildlife conservation | 3 |