Computer Aided Design and Drafting Section:CAD and CADD
CAD software is commonly used for drafting architectural and engineering drawings and for making technical illustrations of any kind.
If you are a professional associated with design or drafting or would just like to widen your knowledge about CAD applications, then you will find this section of informative and useful.
CAD enables you to prepare fast and accurate drawings.
It provides flexibility to change drawings with minimal effort....
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http://www.caddprimer.com/library/
10/11/2007