... specializaed manufactruer 3.high efficiency,economical It suits application with ventilation volume of 1,400~13,000m3/h, and ... refrigeration and warm ventilation industry.XUEER axial fans with external rotor are featured with compact structure, small size, light weight, ... double-sided dyamic balance.fan blade,rotor and grid is coated with plastic, the surface has bright appearance and good corrosion ...