1. The outer frame material is made of thick galvanized sheet with strong corrosion resistance;

2. The outer frame is made using CNC machine tools, with excellent craftsmanship and high precision;

3. There are two types of high-strength aluminum alloy cast steel for the wheel hub: a new type of twisted stamping formed fan blade;

4. A reasonable blade angle can achieve a good level of air flow;

5. The microcomputer assisted manufacturing system can enable the fan to perform effectively; Strict quality inspection procedures: noise detection, vibration detection, concentric performance detection, fan blade speed detection, overall efficiency detection