import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-6,0))
r=w0.sketch().segment((57,-79),(73,-79)).arc((98,-76),(86,-53)).segment((86,-44)).segment((57,-44)).close().assemble().finalize().extrude(-37).union(w0.sketch().segment((-100,-5),(-74,-5)).segment((-74,-8)).segment((-60,-10)).segment((-60,84)).segment((-100,84)).close().assemble().finalize().extrude(48))