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Abstract In this paper, a commonly used graphics software CADPCAM exchange files (DXF file) of the structure and DXF files based on planar NC NC code generation software interface technology, the overall framework of design and NURBS curve analysis and NC code generation. Keywords: DXF NC code NURBS curves: TG659 code: B Article ID: 1671-3133 (2002) 02-0020-02