import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,16,0))
r=w0.workplane(offset=-42/2).moveTo(-34,32).cylinder(42,16).union(w0.sketch().segment((-4,-17),(2,-17)).arc((3,-21),(4,-24)).segment((4,-17)).segment((12,-17)).segment((12,-13)).segment((4,-13)).segment((4,-6)).arc((3,-10),(2,-13)).segment((-4,-13)).close().assemble().finalize().extrude(-4)).union(w0.sketch().arc((-14,-9),(-12,-11),(-11,-13)).segment((16,-48)).segment((50,-21)).segment((20,17)).close().assemble().finalize().extrude(10))