... /DQS/API/AAA 3.Made Style:Manufacture and OEM Simple Roller Chains with A and B Series 1: Technical parameter 2.Roller chain ... ,100 square meters, have more than 1,800 sets of advanced equipment and over 3,100 highly skilled employees, the annual production ... . we specialized in producing all kinds of standard chains and special chains, such as A or B series chains, driving chains, conveyor chains ...