import cadquery as cq
w0=cq.Workplane('YZ',origin=(50,0,0))
r=w0.sketch().segment((-46,-46),(28,-46)).segment((28,-19)).arc((13,46),(-5,-19)).segment((-46,-19)).close().assemble().reset().face(w0.sketch().segment((-1,-4),(33,-13)).segment((37,2)).segment((14,8)).arc((13,16),(7,10)).segment((2,11)).close().assemble(),mode='s').push([(13.5,-12)]).rect(1,2,mode='s').finalize().extrude(-100)