1. We mainly product many roller chains and couplings, so many roller chains have many benifts, such as: Roller chain has two types, one is closed loop type, one is open. Closed loop type roller chain base has soft, plate above for carrying rope, plate connected with the pin chain, a rail wheel is at each end can run along the track. 2. Because the stainless steel chain plate is closed, so there is no danger Of falling. The advantage of this kind of roller chain is rail wheel, easy replacement m

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