The power output is soft and uniform, and the driving is comfortable without sudden feeling. The heat dissipation structure of the shell is reasonable, and it is not easy to be damaged by accumulated heat under high load. The locking is reliable, the gear is not disengaged, and the power transmission is not interrupted or skidded. The bearing runs smoothly, is wear-resistant and high temperature-resistant, and prolongs the life of the assembly., Manufacturer: shanxiriyuezhengshangmaoyouxiangongsi