#B6----------------------------------------------
plane p 0 0 0 1 0 0 0 1 0
pcylinder p p 20 30
profile pf o 20 4 10 p 1 0 0 0 1 0 l 7 t 0 30 \
t -7 0  
revol p2 pf 20 0 0 0 0 1 170
bfuse f p p2
nexplode f f
depouille result f 0 0 1 f_3 3 0 0 35 0 0 1

checkprops result -s 7525.77