The invention is not limited to any particular number of particular number of passageways or {HEAD ~ positioning} of {TAIL ~ passageways} along the yoke 
The invention is not limited to any particular number of particular number of passageways or { HEAD ~ positioning } of { TAIL ~ passageways } along the yoke
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH