puts "========================"
puts " OCC407 "
puts "(case 2)"
puts "========================"
puts ""

pcylinder b1 1 4
pcylinder b2 1 4
trotate b2 0 0 2 1 0 0 90
trotate b2 0 0 2 0 1 0 60

bcut result b2 b1 
checkshape -top result

set square 31.4159
set 2dviewer 0