import cadquery as cq
w0=cq.Workplane('YZ',origin=(-15,0,0))
r=w0.sketch().push([(-10.5,26.5)]).rect(5,17).push([(-11,23)]).circle(1,mode='s').reset().face(w0.sketch().segment((-7,-30),(17,-50)).segment((33,-31)).segment((8,-11)).close().assemble()).finalize().extrude(-4).union(w0.workplane(offset=34/2).moveTo(-10,27).cylinder(34,23))