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import cadquery as cq
w0=cq.Workplane('YZ',origin=(-100,0,0))
r=w0.sketch().arc((-6,-72),(17,-11),(70,27)).arc((-55,44),(-6,-72)).assemble().finalize().extrude(70).union(w0.workplane(offset=200/2).moveTo(3,0).cylinder(200,26))