Any DWG to DXF Converter 

DWG to DXF Converter is a batch DWG and DXF bi-directional converter that allows you to convert DWG to DXF, DXF to DWG without the need of AutoCAD. It is also an AutoCAD drawing file version converter.
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AutoCAD DWG to DXF 

AutoCAD DWG to DXF is a batch DWG DXF bi-directional converter that allows you to convert DWG to DXF, DXF to DWG without the need of AutoCAD. It is also an AutoCAD drawing file version converter.
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PDF to DWG 

PDF to DWG is a powerful windows program that will help you convert your PDF files to usable and editable DXF/DWG files quickly and easily. You can import DXF files into AutoCAD and save them as DWG format.
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Any DWF to DWG Converter 

DWF to DWG Converter allows you to convert DWF files to AutoCAD DWG and DXF file formats, you can recover DWF entities to corresponding DWG entities easily. It supports the DWF layers, multi-page specification and all entity types.
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DWF to DWG 

DWF to DWG allows you to convert DWF files to AutoCAD DWG and DXF file formats, you can recover DWF entities to corresponding DWG entities easily. It supports the DWF layers, multi-page specification and all entity types.
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PDFIn PDF to DWG Converter 

PDF to DWG Converter, an AutoCAD Addin help you import PDF file into AutoCAD. It supports AutoCAD 2006, 2005, 2004, 2002, 2000/i and R14
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