A reducer is an independent component composed of gear transmission, worm drive, and gear worm drive enclosed in a rigid housing, commonly used as a reduction transmission device between the prime mover and the working machine. Plays the role of matching speed and transmitting torque between the prime mover and the working machine or actuator.

The product categories involved in the reducer industry include various types of gear reducers, planetary gear reducers, and worm gear reducers, as well as various transmission devices such as speed increasing devices, speed regulating devices, and various composite transmission devices including flexible transmission devices. The product and service fields involve industries such as metallurgy, non-ferrous metals, coal, building materials, shipbuilding, water conservancy, electricity, engineering machinery, and petrochemicals.