import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,2,0))
r=w0.workplane(offset=-52/2).moveTo(13,23).box(26,40,52).union(w0.workplane(offset=29/2).moveTo(-6.5,-14).box(39,2,29)).union(w0.sketch().segment((3,-34),(12,-43)).segment((17,-37)).segment((13,-33)).segment((11,-33)).segment((11,-32)).segment((8,-29)).close().assemble().push([(10,-35.5)]).rect(8,1,mode='s').finalize().extrude(48))