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1 зона ухудшения качества воды в водотоках
Makarov: a zone of decline in a water course (falling level of dissolved oxygen) (уровень растворённого кислорода падает), zone of decline in a water course (falling level of dissolved oxygen) (уровень растворённого кислорода падает)Универсальный русско-английский словарь > зона ухудшения качества воды в водотоках
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