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