import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-72,0))
r=w0.sketch().segment((-100,-11),(-99,-19)).segment((-80,-16)).arc((12,-80),(81,8)).segment((100,11)).segment((99,19)).segment((80,16)).arc((-12,80),(-81,-8)).close().assemble().finalize().extrude(144)