| |||
下水道系统; 污水系统 | |||
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污水处理系统 | |||
污水系统; 排水沟道 | |||
下水道系统 | |||
排污水系统 | |||
生活污水系统 | |||
排污系统 | |||
污水管道系统 |
sewage systems: 52 phrases in 11 subjects |
Agriculture | 1 |
Desert science | 1 |
Earth sciences | 1 |
Ecology | 2 |
Engineering geology | 3 |
Environment | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 1 |
Nautical | 4 |
Technology | 35 |
Water resources | 2 |