... with products!!!!! Nantong Sanzhong Pipeline Co., Ltdgreen house, garden tools,canopy, steel pipewe produce steel pipe, ... ends;high power ventilator is equipped inside the house to draw out hot air with forced ventilation, ... environment through winter and summer.Features:Cooling system:ventilation cooling,spraying cooling,pad cooling,turbine forced air cooling;Heating system:insulation,water-heating, ...