Impeller Involute, advanced and reasonable, overall efficiency, excellent material, long life, low noise. "Inflatable Air Blower" forced lubrication, boost, high precision rotor balancing, vibration small, long-term safe and reliable operation. The main parts are CNC machining equipment, precision gears 5, products of high precision, reliable operation. Cabinet, wall panels using carved structure, easy maintenance. Compact structure, small size, light weight, ease of use and maintenance.