The end conductive segments at {HEAD ~ each polygon vertex} in {TAIL ~ the outermost row} are disjoined in the outermost row 
The end conductive segments at { HEAD ~ each polygon vertex } in { TAIL ~ the outermost row } are disjoined in the outermost row
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH