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import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-8,0))
r=w0.workplane(offset=7/2).moveTo(0,-37).cylinder(7,63).union(w0.sketch().push([(15,54)]).circle(46).push([(35.5,46.5)]).rect(33,3,mode='s').finalize().extrude(17))