Lianzhong Industry Co.,Limited is one of the biggest supplier of bimetallic screw&barrel and twin screw&barrel in China. The occupied area is more than 14000 m2. Integration of “Science and technology, production, sales”, introducing into the high and new technology, w dedicate to research and develop Cobalt-based Tungsten carbide super hard bimetallic screw and barrel with high wearing resistance, high corrosion resistance, high hardness which lies in the top place in the world now. Especially, Nickel-based Cobalt-chromium bimetallic conical twin barrel with high wearing resistance have already gained the national patent(Patent No.ZL2005201***31.9). We have unique view of processing technology of special bimetallic barrel screw barrel in Halogen-free flame-retardant plastic, high fiberglass plastic, magnetic plastic, high calcium powder plastic, Bakelite plastic, XPS etc in engineering plastics.