1, flat belt is a belt zui old varieties, there are about 100 years of history, but until the middle of the 20th century, still occupy about half of the market share on the belt. It with simple structure, easy to drive, not restricted by distance, easy to adjust the replacement etc. , are widely used in all kinds of industrial and agricultural machinery. 2, triangle, also known as 'V' belt, transmission belt production in large zui, wide varieties zui zui, USES more of a product. Since 1917, song ci is made by the American automobile fan belt, after the promotion for the workers and peasants machinery at the beginning of 20 s, more than half a century, developing very rapidly, has become the mainstream of the belt. Belt in the countries all over the world, from the point of dosage of rubber, triangle has accounted for 65%, toothed belt was 25%, flat bring it back down to below 10%. At present, triangle has become the world's all kinds of mechanical power transmission and variable speed of main equipment, in the modern agricultural machinery, machine tools, automobiles, ships, office equipment such as a wide range, is playing an increasingly important role. 3, circular belt for section assumes the circular belt, it can free bending drive. This belt is made in pu more, there is usually no core body, zui structure is simple, easy to use. Opens a new route for the tape drive round belt, countries around the world in small machine tools, sewing machines, fine mi mechanical aspects of consumption growing rapidly, has a great potential in the future. Tags: three guinness triangle toothed triangle triangle agent