... storage, and supermarketDJF-C series Cone exhaust fansReasonable cone designing, low noise, big air flow, strong ... ventilation, low cost ,Imported bearingUsing air downstream principle, pvc shutter or aluminum shutter,antioxidant, light weight, no distortion,open and ... rotational speed rpmMotor rotational speed rpmAir flow m/hTotal pressureNoise decibelsImport powerRated ...