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   CAD/CAM

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catia, ansys, Pro/Engineer, SolidWorks

  CAD/CAM Journal

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  CAD  link site

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(CAD sites organized into TopTen lists,covering all major CAD  software packages, industries, CAD jobs, tutorials, tips and tricks, etc. )

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(Database of CAD/CAM/CAE resources on the Web. )

  STEP
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  Modeling Kernel Site

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(Open CASCADE,  the open source set of C++ geometric modeling components, on Linux, Unix and Windows NT is available for download. )

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(The Modeling Kernel used in AutoCAD, Mechanical Desktop, CADKEY, IronCAD.)

  Geometry Site
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