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1. Reasonable cone designing, low noise, big air flow, strong ventilation, low operation cost.
2. Automatic start and stop, when the motor start, the shutter automatically open, the fan working stable.
3. The shutter blades sealing well
4.Imported bearing, high-strength, long use life
5. Using air downstream principle, pvc shutter or aluminum shutter, antioxidant, light weight, no distorition, open and close are flexible,prevent the backflow of air
6. 6Pcs fiberglass blades, no distortion, nibreaking, aesthetic durability.
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