220V AC Cooling Fan Four security

1. "220V AC Cooling Fan" motor cover made of high quality steel materials, rigid material, it is not broken, do not deform
2. "ios版雷竞技官网入口 " good sealing performance motor cover fire. Electric shock, use safer
3. Motor Cover all been galvanized anti-rust treatment, corrosion resistance, the use of safer
4. Each "ios版雷竞技官网入口 " stator into the model, we need to go through ground-pressure test of 1900 volts and 2000 volts / second turn detection