import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,0))
r=w0.sketch().push([(-13,18)]).circle(13).circle(1,mode='s').finalize().extrude(-43).union(w0.workplane(offset=-4/2).moveTo(10,-15).cylinder(4,35)).union(w0.workplane(offset=42/2).moveTo(-13,18).cylinder(42,32))