import cadquery as cq
w0=cq.Workplane('YZ',origin=(2,0,0))
r=w0.sketch().arc((-25,-39),(-10,-23),(-25,-7)).close().assemble().finalize().extrude(-52).union(w0.workplane(offset=-38/2).moveTo(-16,37).cylinder(38,2)).union(w0.workplane(offset=48/2).moveTo(15,0).cylinder(48,10))