import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,19,0))
w1=cq.Workplane('YZ',origin=(12,0,0))
r=w0.workplane(offset=-69/2).cylinder(69,46).union(w1.sketch().segment((-3,-13),(17,-13)).arc((18,-11),(20,-13)).segment((50,-13)).segment((50,13)).segment((-3,13)).close().assemble().push([(22,9)]).circle(3,mode='s').finalize().extrude(-54))