A noncircular face gear (NFG) conjugated with a pinion is a new type of face gear which can transmit variable velocity ratio and in which two time-varying excitations exist. namely the meshing stiffness excitation and instantaneous center excitation. Considering the tooth backlash. static transmission error and multifrequency parametric excitation. https://www.itsmajorlook.com/top-deal-Dallas-Cowboys-logo-Fan-Decals-3-75-x-5-p32366-top-mega/