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