| |||
| возвратный активный ил; возвратный ил (ил для прививки свежей сточной жидкости) | |||
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return-sludge : 22 phrases in 10 subjects |
| Construction | 4 |
| Ecology | 4 |
| Energy industry | 1 |
| General | 1 |
| Karachaganak | 1 |
| Makarov | 2 |
| Natural resourses and wildlife conservation | 3 |
| Sewage and wastewater treatment | 1 |
| Technology | 2 |
| Water supply | 3 |