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import cadquery as cq
w0=cq.Workplane('YZ',origin=(30,0,0))
r=w0.sketch().arc((-1,-66),(8,-72),(17,-79)).segment((17,-21)).segment((-1,-21)).close().assemble().finalize().extrude(-130).union(w0.sketch().arc((-43,79),(-7,7),(48,66)).arc((0,56),(-43,79)).assemble().push([(8,-26)]).rect(18,32).finalize().extrude(70))