4-72 type centrifugal fan, a light weight, little vibration, low power consumption, noise, long life and corrosion resistance advantages, and supporting the supply damper or steel pedestal seat house, the fan produced, with different types of specifications for customer choice. WS85-6 roof centrifugal blower fan of the series Introduction to glass fiber reinforced plastic material, with air pressure big, handsome in appearance, compact structure, high strength, light weight, corrosion resistance, low noise, reliable operation, convenient installation. Shaft can be used for roofs, pipes and other exhaust. ... (