import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-12,0))
r=w0.sketch().arc((-35,3),(-31,-6),(-21,-3)).arc((-31,-4),(-35,3)).assemble().finalize().extrude(-11).union(w0.workplane(offset=16/2).moveTo(-16,-29).cylinder(16,21)).union(w0.sketch().push([(25,10)]).circle(11).push([(35.5,43)]).rect(3,14).finalize().extrude(35))