... 3)certificate: ISO9001-2000 Flat belt NO.1,CharacteristicsCommon flat rubber belt, also called transmission belt, ususlly uses high quality cotton ... flat rubber belt has the characteristics of high strength ,good flexibility, and small elongation, It is mainly used in factories, mines ... , and the sides of the belts are round.Flat belt NO.3 , physical propertyelongation at break :in vertical tensile ...