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The technical principle of the product is a process technology in the case of ensuring the same chemical composition of the copper by vacuum centrifugal casting to complete. Can direct composite and adjust any of the face and the thickness of the copper layer. The combination of strong, wear properties of the mechanical properties of steel and copper. This technology technical indicators, applications use are better than any kind of copper - steel bimetal composite technology, more traditional casting product costs by more than 30%, and a 20% increase in the wear resistance of the product or more. : Nut, worm gear, guide sleeve, bushing, copper products can replace all full The new product uses copper - steel composite structure is very extensive, and has been applied to other industries to promote the use of the machine tool manufacturing, petroleum machinery, forging machinery, plastic machinery, mining machinery, rubber machinery industry.