import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,25))
w1=cq.Workplane('ZX',origin=(0,-1,0))
r=w0.sketch().push([(6,15)]).circle(18).circle(14,mode='s').finalize().extrude(-66).union(w0.workplane(offset=-28/2).moveTo(-35,41).cylinder(28,6)).union(w0.workplane(offset=-14/2).moveTo(6,15).cylinder(14,35)).union(w1.workplane(offset=-49/2).moveTo(35,6).cylinder(49,5))