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