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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,44))
r=w0.workplane(offset=-88/2).moveTo(-10,-53).cylinder(88,39).union(w0.sketch().segment((-72,-100),(51,-100)).segment((51,-17)).arc((11,100),(-52,-6)).segment((-72,-6)).close().assemble().finalize().extrude(-69))