import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,36,0))
r=w0.sketch().push([(45,14)]).rect(50,172).push([(24,-65)]).circle(3,mode='s').finalize().extrude(-72).union(w0.workplane(offset=-38/2).moveTo(-41.5,-34).box(57,132,38))