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| activated sludge | |||
| activated-sludge | |||
| active sludge | |||
| microbial sludge | |||
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| activated sewage | |||
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| activated-sludge | |||
| 活 性 污泥: 340 phrases in 13 subjects |
| Agriculture | 3 |
| Chemistry | 1 |
| Desert science | 1 |
| Earth sciences | 9 |
| Ecology | 32 |
| Environment | 3 |
| Metallurgy | 3 |
| Oil / petroleum | 5 |
| Oil processing plants | 2 |
| Rail transport | 1 |
| Technology | 224 |
| Textile industry | 1 |
| Water resources | 55 |