import cadquery as cq
w0=cq.Workplane('YZ',origin=(50,0,0))
r=w0.sketch().segment((-20,-32),(-13,-32)).arc((-17,-27),(-20,-21)).close().assemble().finalize().extrude(-100).union(w0.workplane(offset=-62/2).moveTo(0,5).cylinder(62,27))