active sludge
| aeration method
| active sludge | |
| oil | 活性污泥 |
| aeration method | |
| agric. | 通气法 |
| fishery | 增氧方法; 充氧方法 |
| |||
| 活性污泥 | |||
|
active sludge : 9 phrases in 3 subjects |
| Oil / petroleum | 2 |
| Technology | 2 |
| Water resources | 5 |