ABSTRACT
Auto CAD is an essential application software to industrial engineering drawings, it is widely used in various engineering and construction fields. DXF, which short for Drawing Exchange Files are ASCII files that write all the information about the graph according to the rule format (Mu et al. 2001). Auto CAD can directly draw the graphics based on the information that provided by the DXF, also can automatically convert into the corresponding DXF by the internal graphics file (the DWG file).
