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| 阶段曝气［法］ | |||
| 阶段曝气; 多级曝气; 分级通气 (指处理活性污泥的一种方法); 分段曝气 | |||
| stage aeration: 19 phrases in 3 subjects |
| General | 1 |
| Technology | 15 |
| Water resources | 3 |
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