The reducer is widely used in various fields such as the national economy and national defense. These reducer oroducts are developed from the single cycloid reducer to five categories. There are the cycloid reducer, continuously variable transmission, gear reducer, worm reducer, and the motorized pulley. According to preliminary statistics, main industries for the reducer applications are: electrical machinery, metallurgical machinery, environmental protection machinery, electronic appliances, road construction machinery, chemical machinery, food machinery, light industry machinery, mining machinery, transportation machinery, construction machinery, building materials machinery, cement machinery, rubber machinery, hydraulic machinery, and petroleum machinery, etc. The amount of reducers applied in these industries accounts for about 60% to 70% of the total number of speed reducer application in various industries in the country.