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import cadquery as cq
w0=cq.Workplane('YZ',origin=(-28,0,0))
r=w0.sketch().segment((-72,69),(-48,69)).segment((-48,58)).segment((-7,58)).segment((-7,69)).segment((17,69)).segment((17,89)).segment((-7,89)).segment((-7,99)).segment((-48,99)).segment((-48,89)).segment((-72,89)).close().assemble().push([(-28,79)]).circle(17,mode='s').finalize().extrude(-67).union(w0.workplane(offset=6/2).moveTo(0,-24).cylinder(6,76)).union(w0.workplane(offset=124/2).moveTo(-28,79).cylinder(124,21))