import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,7,0))
r=w0.sketch().push([(-83,-2)]).rect(34,16).reset().face(w0.sketch().segment((-89,-8),(-77,-8)).segment((-77,5)).segment((-86,5)).arc((-91,4),(-89,-1)).close().assemble(),mode='s').finalize().extrude(-26).union(w0.workplane(offset=11/2).moveTo(74,0).box(52,56,11))