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| 水充气 通过在污水或水中增加空气含量，提高溶氧水平。 (Добавление воздуха к стокам или воде для повышения уровня растворенного кислорода); 污水充气 | |||
| аэрация воды: 1 phrase in 1 subject |
| Water supply | 1 |
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