factory sewage 工厂废水...trade-waste sewage 工业污水...activated sewage 活化污水...sewage work 污水处理厂...biological sewage treatment 污水生物处理...sewage farm 污水处理场...sewage n.脏水,污水污水,污物...activated sludge sewage 活化污泥...fecal sewage 粪便污水...sewage lagoon 污水池...crude sewage 原污水...aeration of sewage 污水曝气处理...sewage system 污水系统...biological treatment of sewage 污水生物学处理...combined sewage 混合污水...sewage-disposal 污水处理法...sewage treatment screens 处理污水筛网...sewage treatment 污水处理法...septic sewage 污水;腐败的污水腐败性污水...sewage gas 沼气...sewage pump 污水泵...
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