Revolved : Examples of Revolved sketches - KeithSloan/GDML GitHub Wiki
A GDML object can be created by Revolving a FreeCAD sketch.
When exported the GDML object will be created a series of booleans
The following show a GDML objects created as Revolved sketch and the exported GDML Objects in Geant4's load_gdml.
In this example the sketch is exported as a Tube and a Polycone.