CAD Schroer GmbH
Manufacturer and vendor of the MEDUSA parametric 2D CAD system, and several application specific extensions.
http://www.cad-schroer.com/
Pressure Vessel Drafting Guide
Detailed instructions on how do design and draft pressure vessels with AutoCAD, with examples.
http://www.geocities.com/ww_chew/pvdrafting/pvd-frame.htm
CadStd
A drafting program for Windows, with a free lite version.
http://www.cadstd.com/
General CADD Products, Inc.
About the General CADD Pro 2D Windows CAD program, with user forums and a downloadable manual.
http://www.generalcadd.com/
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