import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,13,0))
r=w0.workplane(offset=-26/2).moveTo(13,-7.5).box(40,23,26).union(w0.workplane(offset=-24/2).moveTo(9,43.5).box(40,13,24)).union(w0.sketch().segment((-29,-50),(-25,-50)).segment((-25,-35)).arc((-22,-30),(-25,-25)).segment((-25,-21)).arc((-22,-6),(-29,-20)).segment((-29,-25)).arc((-33,-30),(-29,-35)).close().assemble().push([(3,-33)]).circle(7).finalize().extrude(-5))