import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-22,0))
r=w0.workplane(offset=42/2).moveTo(23.5,8).box(53,42,42).union(w0.sketch().segment((-50,-16),(-40,-16)).arc((-41,-9),(-40,-1)).segment((-50,-1)).close().assemble().reset().face(w0.sketch().segment((-33,-27),(-29,-29)).segment((-28,-25)).arc((-30,-25),(-32,-24)).close().assemble()).reset().face(w0.sketch().arc((-20,8),(-18,8),(-16,7)).segment((-14,10)).segment((-18,12)).close().assemble()).finalize().extrude(44))