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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,2))
r=w0.workplane(offset=-98/2).moveTo(25,42).cylinder(98,9).union(w0.workplane(offset=9/2).moveTo(25,42).cylinder(9,51)).union(w0.sketch().segment((-81,-100),(20,-100)).segment((20,-10)).segment((21,-10)).segment((21,-15)).segment((81,-15)).segment((81,100)).segment((-32,100)).segment((-32,0)).segment((-81,0)).close().assemble().push([(-4,40)]).rect(20,16,mode='s').finalize().extrude(94))