By iCADsales.com LLC about progeCAD Smart! 2009 Personal CAD
This library can be easily loaded into AutoCAD or AutoCAD LT's menu bar.
Designs MFB and Sallen-Key low-pass and high-pass filters.
With it, you'll be able to quickly insert the symbol to piping drawings.
you'll be able to quickly insert the symbols you need to generate piping diagram
Make your models alive with interactive 3D rendering for CAD data.