With high efficiency and low rib thread Tube with heat transfer efficiency, small size, the advantage…

采用高效低肋螺纹换热管，具有换热效率高、体积小、用水量小等优点；

youdao

With high efficiency and low rib thread Tube with heat transfer efficiency, small size, the advantage…

采用高效低肋螺纹换热管，具有换热效率高、体积小、用水量小等优点；

youdao