 |
| |||
| схема обогащения; схема обработки; схема пропитки | |||
| treatment scheme: 5 phrases in 3 subjects |
| Ecology | 1 |
| Technology | 3 |
| Water supply | 1 |
|
| |||
| схема обогащения; схема обработки; схема пропитки | |||
| treatment scheme: 5 phrases in 3 subjects |
| Ecology | 1 |
| Technology | 3 |
| Water supply | 1 |