import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-29,0))
r=w0.sketch().push([(-28.5,-38.5)]).rect(43,13).reset().face(w0.sketch().segment((3,-22),(50,-22)).segment((50,25)).segment((43,25)).arc((28,45),(13,25)).segment((6,25)).segment((11,-6)).segment((3,-7)).close().assemble()).push([(14.5,-42.5)]).rect(15,1).finalize().extrude(58)