Protuberances within {HEAD ~ the shelf retainer} engage {TAIL ~ the top edge} of the shelf bracket to prevent cutting of the retainer by the bracket in the presence of high stresses 
Protuberances within { HEAD ~ the shelf retainer } engage { TAIL ~ the top edge } of the shelf bracket to prevent cutting of the retainer by the bracket in the presence of high stresses
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH