import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-5,0))
r=w0.sketch().segment((8,-15),(12,-15)).segment((12,8)).arc((25,49),(8,10)).close().assemble().finalize().extrude(-3).union(w0.sketch().push([(-14.5,-39.5)]).rect(53,21).reset().face(w0.sketch().segment((-26,-13),(-15,-22)).segment((-3,-8)).arc((11,28),(-15,0)).close().assemble()).push([(0,11)]).circle(3,mode='s').finalize().extrude(12))