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This paper presents a new methodology for finishing sculptured surfaces on 3-axis CNC milling machines using ball end mill tools. The suggested methodology is based on the localization of local forms composing the surfaces and is divided into three stages. In the first stage, the surfaces are triangulated semi adaptively. In the second stage, the local forms of points are identified (concave, convex, plane, concave developable, convex developable and saddle), thereafter the triangles having thefatcat:pb6zzhp4kva45gdgyhyyt44ley