import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,26,0))
r=w0.workplane(offset=-52/2).moveTo(14,40).cylinder(52,7).union(w0.sketch().push([(-41,27)]).circle(9).push([(27,-24)]).circle(23).circle(2,mode='s').finalize().extrude(-50))