This paper discussed the design criteria of material selection,the area of single unit,flow path,flow rate of a plate heat exchanger (PHE)in a geothermal heating system.是什么意思_This paper discussed the design criteria of material selection,the area of single unit,flow path,flow rate of a plate heat exchanger (PHE)in a geothermal heating system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句