import cadquery as cq
w0=cq.Workplane('YZ',origin=(19,0,0))
r=w0.sketch().segment((-48,-37),(-40,-37)).arc((-25,-50),(-11,-37)).segment((-3,-37)).segment((-3,-33)).segment((-11,-33)).arc((-25,-20),(-40,-33)).segment((-48,-33)).close().assemble().finalize().extrude(-38).union(w0.workplane(offset=-16/2).moveTo(31.5,39).box(33,22,16))