import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-5,0))
r=w0.sketch().push([(30,2)]).circle(20).reset().face(w0.sketch().segment((21,4),(38,-3)).segment((39,0)).segment((22,7)).close().assemble(),mode='s').finalize().extrude(9).union(w0.sketch().segment((-50,-13),(-32,-13)).segment((-32,-22)).segment((-29,-22)).segment((-29,-13)).segment((-11,-13)).segment((-11,12)).segment((-29,12)).segment((-29,21)).segment((-32,21)).segment((-32,12)).segment((-50,12)).close().assemble().finalize().extrude(11))