The mattress supporting structure 1, wherein said {HEAD ~ corner guard} is attached to {TAIL ~ said base} by stapling, such that said guard is deformed when said grid is deflected downwardly 
is attached to
The mattress supporting structure 1 , wherein said { HEAD ~ corner guard } is attached to { TAIL ~ said base } by stapling , such that said guard is deformed when said grid is deflected downwardly
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH