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| aeration plant; effluent purification plant; biological treatment plant; secondary treatment plant; sludge contact clarifier; sewage treatment plant; activated sludge unit | |||
| aeration station; activated sludge plant | |||
| activated sludge plant (сооружение для биохимической очистки сточных вод путем аэрации с активным илом) | |||
| станция аэрации: 8 phrases in 2 subjects |
| Construction | 6 |
| Ecology | 2 |