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import cadquery as cq
w0=cq.Workplane('YZ',origin=(-18,0,0))
r=w0.sketch().segment((-79,-100),(18,-100)).segment((18,-13)).arc((43,-9),(63,5)).arc((74,11),(75,24)).arc((14,99),(-22,9)).segment((-79,9)).close().assemble().finalize().extrude(-74).union(w0.sketch().arc((27,49),(17,39),(29,47)).arc((27,47),(27,49)).assemble().finalize().extrude(109))