import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,41,0))
r=w0.workplane(offset=-82/2).moveTo(-44,-90).cylinder(82,10).union(w0.sketch().push([(20,-2)]).circle(34).push([(41,84.5)]).rect(8,31).finalize().extrude(-53))