import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,26))
r=w0.workplane(offset=-76/2).moveTo(-18,-11).cylinder(76,8).union(w0.sketch().segment((-32,40),(31,8)).arc((5,36),(-32,40)).assemble().reset().face(w0.sketch().arc((24,-42),(29,-35),(32,-27)).close().assemble()).finalize().extrude(24))