import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-18))
r=w0.sketch().segment((-38,20),(-4,20)).segment((-4,12)).segment((5,12)).segment((5,31)).segment((-1,31)).segment((-1,50)).segment((-38,50)).close().assemble().reset().face(w0.sketch().segment((-27,32),(-24,32)).arc((-20,30),(-16,32)).segment((-13,32)).segment((-13,38)).segment((-16,38)).arc((-20,40),(-24,38)).segment((-27,38)).close().assemble(),mode='s').reset().face(w0.sketch().arc((-1,21),(2,21),(-1,22)).close().assemble(),mode='s').finalize().extrude(4).union(w0.sketch().segment((3,-14),(36,-16)).segment((38,7)).segment((35,8)).segment((35,40)).segment((8,40)).segment((8,9)).segment((5,10)).close().assemble().push([(17,-39)]).circle(11).finalize().extrude(36))