import cadquery as cq
w0=cq.Workplane('YZ',origin=(0,0,0))
r=w0.sketch().push([(-29,-7)]).circle(15).push([(-28,-8)]).circle(9,mode='s').finalize().extrude(-28).union(w0.workplane(offset=4/2).moveTo(18,33).cylinder(4,17)).union(w0.workplane(offset=28/2).moveTo(23,-29).cylinder(28,21))