import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-20))
r=w0.sketch().push([(27,23)]).circle(23).circle(19,mode='s').finalize().extrude(39).union(w0.sketch().push([(-47,-40)]).rect(6,12).push([(-44.5,-35.5)]).rect(1,1,mode='s').finalize().extrude(41))