1.with 30years anti-corrosion 2.fiber glass material 3.Huge wind ... , dyeing, laundry and other workshops with high temperature.2. Civil fields: net bars, stores, supermarkets, mess ... fields: large farms, greenhouse and livestock farms, etc.2,General Information :1.Availbale in 58" & 42" ... design provides excellent performance without a cone.2.Thick and corrosion resistance SMC housing with ...