import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-3,0))
r=w0.sketch().segment((-50,3),(-29,-5)).segment((-25,5)).arc((-16,15),(-16,28)).segment((-13,39)).segment((-34,47)).segment((-38,36)).arc((-47,27),(-46,13)).close().assemble().push([(-24,17)]).circle(2,mode='s').finalize().extrude(1).union(w0.sketch().segment((39,-39),(41,-39)).segment((41,-47)).segment((47,-47)).segment((47,-39)).segment((50,-39)).segment((50,-32)).segment((47,-32)).segment((47,-24)).segment((41,-24)).segment((41,-32)).segment((39,-32)).close().assemble().finalize().extrude(7))