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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,89))
r=w0.workplane(offset=-178/2).moveTo(-59,0).cylinder(178,41).union(w0.sketch().segment((80,4),(91,4)).segment((93,4)).segment((96,4)).arc((88,25),(80,4)).assemble().reset().face(w0.sketch().arc((86,2),(88,1),(90,2)).close().assemble()).finalize().extrude(-123))