import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,24,0))
w1=cq.Workplane('YZ',origin=(-16,0,0))
r=w0.workplane(offset=-58/2).moveTo(7,31).cylinder(58,19).union(w0.sketch().arc((-7,-23),(-30,-44),(-6,-24)).segment((32,-24)).arc((32,-23),(33,-22)).segment((-7,-22)).close().assemble().finalize().extrude(-18)).union(w1.workplane(offset=9/2).moveTo(32.5,22).box(3,10,9))