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