import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-18))
r=w0.sketch().arc((-29,-73),(11,-87),(-27,-68)).segment((-24,-68)).segment((-24,-73)).close().assemble().push([(-22,-23)]).circle(4).finalize().extrude(3).union(w0.sketch().segment((-52,20),(-49,20)).segment((-49,-18)).segment((52,-18)).segment((52,100)).segment((-52,100)).close().assemble().push([(0,41)]).circle(22,mode='s').finalize().extrude(35))