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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,88))
r=w0.workplane(offset=-176/2).moveTo(9.5,11).box(11,178,176).union(w0.sketch().push([(0,-23)]).circle(77).reset().face(w0.sketch().segment((-18,-49),(-7,-49)).arc((0,-50),(7,-49)).segment((17,-49)).segment((17,-43)).arc((26,-23),(17,-5)).segment((17,1)).segment((7,1)).arc((0,3),(-7,1)).segment((-18,1)).segment((-18,-5)).arc((-26,-23),(-18,-43)).close().assemble(),mode='s').finalize().extrude(-88))