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Studies on extracting entity data from AutoCAD

ZHAI Guo - dong, LIN Fu - yan,WEN lian - ju (China University of Mining Technology,Beijing 100083, China)  
For extracting entity data, the structure of DXF file in AUTOCAD is analyzed. The paper mainly studies the way of extracting entity data, such as the basic graghic entity, the dimension entity and block entity etc. It is important for the CAD/CAPP/CAM integration.
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