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import cadquery as cq
w0=cq.Workplane('YZ',origin=(-51,0,0))
r=w0.workplane(offset=-14/2).moveTo(61.5,-43.5).box(33,47,14).union(w0.sketch().push([(-51,-25)]).circle(49).circle(41,mode='s').reset().face(w0.sketch().segment((47,8),(47,10)).segment((60,13)).segment((63,-2)).arc((72,26),(47,8)).assemble()).finalize().extrude(68)).union(w0.sketch().arc((51,-22),(100,10),(56,50)).arc((-48,21),(51,-22)).assemble().push([(9,17)]).circle(51,mode='s').finalize().extrude(117))