import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-25))
r=w0.sketch().segment((13,5),(32,16)).segment((27,24)).segment((13,16)).close().assemble().finalize().extrude(-25).union(w0.workplane(offset=75/2).moveTo(-12,-4).cylinder(75,20))