import cadquery as cq
w0=cq.Workplane('YZ',origin=(-16,0,0))
r=w0.workplane(offset=-34/2).moveTo(-7,0).cylinder(34,18).union(w0.sketch().push([(14,-1)]).circle(11).reset().face(w0.sketch().segment((7,6),(10,-2)).segment((18,1)).segment((14,9)).close().assemble(),mode='s').finalize().extrude(66))