import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-9,0))
w1=cq.Workplane('YZ',origin=(8,0,0))
r=w0.workplane(offset=-31/2).moveTo(-18,-45).cylinder(31,3).union(w0.sketch().segment((-50,-6),(-7,-6)).segment((-7,-28)).segment((11,-28)).arc((43,-29),(43,3)).segment((43,16)).segment((2,16)).segment((2,24)).segment((-50,24)).close().assemble().finalize().extrude(44)).union(w0.workplane(offset=45/2).moveTo(-13,-18).cylinder(45,20)).union(w1.sketch().arc((37,-7),(40,2),(37,11)).close().assemble().finalize().extrude(40))