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import cadquery as cq
w0=cq.Workplane('YZ',origin=(-100,0,0))
r=w0.sketch().circle(65).reset().face(w0.sketch().arc((-44,-31),(0,-54),(44,-31)).close().assemble(),mode='s').reset().face(w0.sketch().segment((-44,31),(44,31)).arc((0,54),(-44,31)).assemble(),mode='s').finalize().extrude(200)