import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,18))
r=w0.sketch().arc((-40,23),(-39,-4),(-23,18)).arc((-22,49),(-40,23)).assemble().finalize().extrude(-37).union(w0.sketch().push([(-10,12)]).circle(10).push([(14,-4)]).circle(9).finalize().extrude(-28)).union(w0.sketch().segment((17,-45),(36,-50)).segment((37,-46)).arc((48,-33),(44,-17)).segment((45,-13)).segment((26,-9)).segment((25,-13)).arc((14,-25),(18,-41)).close().assemble().finalize().extrude(1))