circle w -20 0 0 20 mkedge w w 0 pi/2 wire w w polyline profile 0 0 0 10 0 0 5 0 5 0 0 0 mkplane profile profile pipe s w profile tscale s 0 0 0 SCALE1 fsameparameter s SCALE1*1.e-7 explode s E blend result s 1*SCALE1 s_6 1*SCALE1 s_9 1*SCALE1 s_4 checkprops result -s 90939.5