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| медленная фильтрация; гравитационная фильтрация | |||
| низкоскоростная фильтрация | |||
| slow filtration: 8 phrases in 7 subjects |
| Chemical industry | 2 |
| Ecology | 1 |
| Electronics | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |
| Water resources | 1 |
| Water supply | 1 |
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