import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,21))
r=w0.sketch().segment((-42,4),(-24,4)).segment((-25,-7)).segment((-15,-8)).segment((-13,4)).segment((9,4)).segment((9,38)).segment((-10,38)).segment((-9,49)).segment((-19,50)).segment((-20,38)).segment((-42,38)).close().assemble().push([(17,-25)]).circle(25).circle(12,mode='s').finalize().extrude(-53).union(w0.workplane(offset=10/2).moveTo(-17,21).cylinder(10,3))