1: reduction gear box used in winch 2: welding 3. high quality, competitive price 4. OEM service Dalian yipin machinery manufacturing co.,ltd was estalished in 1997,and takes up land of 30000 square meters and has 5 workshops for riveting-welding,machining and assembling.We have more than 20 technicians,engineers and senior engineers,more than 10 inspecters amoung them including 4 nondestructive ...