Extrude lines on the drawing plane

How do I extrude multiple overlapping circles on the cplane? I want thee width of each circle to be 1mm?

Thank you!

use CurveBoolean with option delete input all/used if you want the curves to be removed. select all curves you want to extrude later then click anywhere outside of those and hit space or enter. now you have combined curves, just select them and use extrude.

Thank you!

Kim de Noüe, PMAFA, ISAR CAP
kim@astrokim.com
(303) 588-8770
Skype: astrokim1
http://www.astrokim.com