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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-2))
r=w0.sketch().segment((-63,-77),(-63,-28)).arc((0,-69),(63,-28)).segment((63,-77)).arc((100,0),(63,77)).segment((63,28)).arc((0,69),(-63,28)).segment((-63,77)).arc((-100,0),(-63,-77)).assemble().finalize().extrude(5)