import cadquery as cq
w0=cq.Workplane('YZ',origin=(9,0,0))
r=w0.sketch().push([(-8,10)]).circle(9).circle(2,mode='s').finalize().extrude(-28).union(w0.sketch().segment((-40,-50),(40,-50)).segment((40,44)).segment((13,44)).arc((-8,50),(-29,44)).segment((-40,44)).close().assemble().finalize().extrude(9))