1.Poultry exhaust fan with CE 2.Import belt 3.Air Volume 46000m3 / h 4.Shutter adopt special push-pull, open- ... punch forming fan blade, reasonable angel and reach the max.air flow, mini. Noise 6. Double bracing (E style) belt transporter, Europe ... test, concentric performance test, fan blade turning speed test, input air test and vehicle efficiency test9.Special motor hole wind shield ...