circle circle 0 0 0 0 0 1 10
revsurf rs_circle circle 0 40 0 1 0 0
offset rs_circle_of rs_circle 5
offset rs_circle_of_of rs_circle_of 5
mkface result rs_circle_of_of 0 1 0 1
set MaxFTol 9.9999999999999995e-08
set MaxETol 8.3145848903596818e-07
set MaxVTol 8.3145848903596839e-07