import cadquery as cq
w0=cq.Workplane('YZ',origin=(-17,0,0))
r=w0.sketch().arc((7,-34),(23,-48),(14,-29)).arc((-17,6),(7,-34)).assemble().finalize().extrude(30).union(w0.sketch().segment((9,34),(10,35)).segment((10,50)).arc((2,35),(10,20)).segment((10,33)).close().assemble().finalize().extrude(34))