Additionally, all our production methods are in compliance with ISO9002 specifications. guarantees the security and consistency of the important operate of components.The new items contain a series of large-tech and high good quality chains and sprockets and gears, such as chains and gearboxes for agricultural machineries, metallurgical chains, escalator stage-chains, high-pace tooth chains, timing chains, self-lubrication chains, among which have type high velocity tooth chain for vehicle branch dynamic box and aerial chains fill in the blanks of chain in China.