... /ISO/DQS/API/AAA 3.Made Style:Manufacture and OEM Simple Roller Chains with A and B Series 1: Technical parameter 2.Roller ... meters, have more than 1,800 sets of advanced equipment and over 3,100 highly skilled employees, the annual production capacity ... series chains, driving chains, conveyor chains, dragging chains, agricultural chains and so on;4. we have obtained ISO9001, ISO14001, ISO16969, AAA ...