box b1 200 200 200 box b2 150 100 100 100 100 150 bfuse boite b1 b2 nexplode boite f profile cont S boite_3 F 75 50 X 50 Y 100 X -50 mksurface su boite_13 mkface fu su featrevol boite cont boite_3 200 0 200 0 -1 0 0 1 featperform revol result boite_3 fu set square 316405