The end conductive segments at each polygon vertex in {TAIL ~ at least one inner row} are joined in {HEAD ~ the inner row} 
The end conductive segments at each polygon vertex in { TAIL ~ at least one inner row } are joined in { HEAD ~ the inner row }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD