 |
| |||
| eaux usées épurées | |||
| |||
| eau purifiée; eau traitée | |||
| очищенные сточные воды: 9 phrases in 5 subjects |
| Chemistry | 1 |
| Natural resourses and wildlife conservation | 3 |
| Nuclear physics | 1 |
| Technology | 1 |
| Water resources | 3 |
|
| |||
| eaux usées épurées | |||
| |||
| eau purifiée; eau traitée | |||
| очищенные сточные воды: 9 phrases in 5 subjects |
| Chemistry | 1 |
| Natural resourses and wildlife conservation | 3 |
| Nuclear physics | 1 |
| Technology | 1 |
| Water resources | 3 |