import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,8))
r=w0.sketch().push([(35,-16)]).circle(10).push([(43.5,14)]).rect(13,24).finalize().extrude(-16).union(w0.sketch().segment((-50,-3),(-41,-3)).segment((-41,-8)).segment((-11,-8)).segment((-11,9)).segment((-50,9)).close().assemble().finalize().extrude(-9))