Laizhou Dingzheng Machinery CO., LTD is located in the beautiful laizhou Bay, Over the years,we have been committed to the production of automobile brake discs,brake drums,various grade of gray irons,ductile iron parts,high carbon and high strength grey cast iron,our main products:Ht200.250.300.g3000.g3500 and other gray iron, qt400-600 and other ductile iron. 
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