Fantastic attention has been compensated on environmental protection and energy saving. The solution well shows environmental safety and vitality saving. The new items contain a collection of high-tech and large top quality chains and sprockets and gears, this sort of as chains and gearboxes for agricultural machineries, metallurgical chains, escalator step-chains, large-pace tooth chains, timing chains, self-lubrication chains, between which have type substantial speed tooth chain for car department dynamic box and aerial chains fill in the blanks of chain in China.