import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-27,0))
r=w0.sketch().push([(9,-32.5)]).rect(26,29).reset().face(w0.sketch().segment((0,29),(9,4)).segment((16,7)).segment((16,1)).segment((34,1)).segment((34,13)).segment((50,19)).segment((41,44)).segment((34,41)).segment((34,47)).segment((16,47)).segment((16,35)).close().assemble()).push([(25,24)]).circle(13,mode='s').finalize().extrude(34).union(w0.workplane(offset=55/2).moveTo(-45,22).box(10,22,55))