... and discoloration, and has good corrosion-resistant effect, motor cover also by the special treatment.4,The ... B-class, F-class and H-class, the protection class is IP54. At present, we can also ... fans can install thermal protection in them. Our factory will put the IP56 external rotor motor with new structure soon ... dual voltage and so on.7,The line fan motor can be directly leaded out, and can provide ...