| |||
| процесс очистки при полном смешивании | |||
|
complete- mixing process : 5 phrases in 4 subjects |
| Construction | 1 |
| Ecology | 2 |
| Technology | 1 |
| Water supply | 1 |
| |||
| процесс очистки при полном смешивании | |||
|
complete- mixing process : 5 phrases in 4 subjects |
| Construction | 1 |
| Ecology | 2 |
| Technology | 1 |
| Water supply | 1 |