... and best price!!!!! Nantong Sanzhong Pipeline Co., Ltdgreen house, garden tools,canopy, steel pipewe produce steel pipe,green ... )& white tube(galvanized steel pipe)-Nantong Sanzhong Pipeline Co.ltd.,locating Jiangsu City,ChinaAddition: Intelligent GreenhouseThe greenhouse features hto ... both ends;high power ventilator is equipped inside the house to draw out hot air with forced ventilation,which ...