import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-15,0))
r=w0.sketch().segment((-17,18),(-17,26)).segment((1,26)).segment((1,23)).arc((12,20),(18,11)).arc((-4,50),(-13,6)).arc((-12,13),(-8,18)).close().assemble().finalize().extrude(-17).union(w0.workplane(offset=47/2).moveTo(-15,-46).cylinder(47,4))