... light weight,and low noise,well anticorrosive. CWZ Series Small-sized axial flow fan 1,GeneralCWZ series marine small sized axial fans are suitablefor ... character-istiv speed & length of the vanes, the fans have low noixe, small size, tight weight, stable performance, ect ... dynamic balance adjustment & over speed test. Therefore, the fans als have the features of good-anticorrosion, anti-swing, ...