Additionally, {HEAD ~ protective fences} 930 extend downward from {TAIL ~ the bottom} of lower tabs 925 of retention channels 915 
extend downward from
Additionally , { HEAD ~ protective fences } 930 extend downward from { TAIL ~ the bottom } of lower tabs 925 of retention channels 915
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH