Imported toothed BeltIncluding the multi-wedge belt, in the past 20 years in the industrialized countries developed extremely fast, is constantly eroding the traditional metal gears, chains and rubber plate and triangular belt market. Currently, in addition to a large number of vehicles and traditional industries, and further expanded to the OA machine (office equipment), Robots and other precision machinery transmission. Because the inner belt with elastomer teeth, can achieve no sliding synchronous transmission, and has a lighter than the chain, small noise characteristics, now more than 80% cars in Europe, the United States 40% of the car has been installed with this type of toothed belt. China produces 2 million cars in 2000, The toothed belt needs more than 7 million. The recently appearing round toothed belt compared to the square tooth belt, further increase the transmission of power and quiet, as a new generation of environmental protection belt, its use of more extensive. Now, it has become the object of use for synchronous transmission, very stringent noise requirements for household and industrial sewing machines, typewriters and copiers.