Autodesk ALIAS 2010 - Page 344

6 Choose ObjectDisplay > Template to return the curves to pickable
geometry.
You will now extrude the circles along the path curve.
7 Choose Surfaces > Swept Surfaces > Extrude . You are prompted to select
curve(s) to extrude.
8 Pick all three circles.
338 | Chapter 6 Modeling a Vacuum Cleaner