... components process as supplied drawings high precision strict testing stainless steel reducing bushing precision mold components produced by Dalian Guoyu Precision ... speed steel, carbon steel, alloy etc. Processing Standards DEM, HASCO, MISUMI, PUNCH, SANKYO, DAYTON Processed andTesting EquipmentsCenter-less grinder, surface grinder,internal grinder,cylindrical grinder, Inneraperture grinder ...