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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-54))
w1=cq.Workplane('XY',origin=(0,0,-40))
r=w0.sketch().segment((-72,-16),(-68,-16)).arc((-70,-14),(-72,-11)).close().assemble().finalize().extrude(-43).union(w0.sketch().push([(-18,27)]).circle(73).reset().face(w0.sketch().segment((-64,72),(-21,-36)).segment((27,-17)).segment((-16,91)).close().assemble(),mode='s').finalize().extrude(-35)).union(w1.sketch().arc((21,12),(33,-100),(42,13)).segment((42,50)).segment((21,50)).close().assemble().reset().face(w1.sketch().segment((10,-95),(30,-95)).segment((30,-85)).segment((52,-85)).segment((52,-2)).segment((42,-2)).segment((21,-2)).segment((13,-2)).segment((13,-36)).segment((10,-36)).close().assemble(),mode='s').finalize().extrude(137))