 |
| |||
| waste water treatment unit | |||
| sewage treatment plant; sewage treatment works; sewage works | |||
| очистные сооружения сточных вод: 13 phrases in 7 subjects |
| Ecology | 4 |
| Energy industry | 1 |
| Medical | 1 |
| Technology | 3 |
| Water resources | 1 |
| Water supply | 1 |
| Weapons of mass destruction | 2 |