生污水 meaning in English

crude sewage

Research on turbulent pipe flow heat - transfer characteristic of urban wastewater as a cool and heat source
城市原生污水冷热源圆管紊流换热特性
Research on wastewater flow resistance characteristic in using urban original wastewater as a cool and heat source
城市原生污水冷热源污水流动阻力特性研究
When using the urban original sewage as cool and heat source of heat pump , the effect to heat exchanger is unavoidable and not disregarded about the formation of soft dirt
摘要当城市原生污水作为冷热源时，换热器软垢对流动换热的影响不容忽视。