bcong1=geom.MakeBoolean(bcong1,cylcongx0,2)
bcong2=geom.MakeBoolean(bcong2,cylcongx0,2)
bcong1=geom.MakeBoolean(bcong1,cylcongy0,2)
bcong1=geom.MakeBoolean(bcong1,cylcongx0,2)
bcong2=geom.MakeBoolean(bcong2,cylcongx0,2)
bcong1=geom.MakeBoolean(bcong1,cylcongy0,2)