import cadquery as cq
w0=cq.Workplane('YZ',origin=(-21,0,0))
r=w0.sketch().push([(0,57)]).circle(43).reset().face(w0.sketch().segment((-12,-100),(40,-100)).segment((40,-46)).segment((2,-46)).arc((2,-61),(-12,-68)).close().assemble()).finalize().extrude(43)