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