1. Small size, air volume, low noise, can save energy. 2. Relatively stable operation, easy installation. 1 ... gas shocks, so blower , the vibration and noise is significantly reduced.1. Using advanced spiral back ... can not enter the device and therefore, the output air is clean, free of grease.4. High ... gears, so that further increase machine life and reduce noise.5. Rotor, cases, wall panels and other ...