The panel has at least one outer edge which is provided with {HEAD ~ a rim} in {TAIL ~ order} to form a shock absorbing edge 
The panel has at least one outer edge which is provided with { HEAD ~ a rim } in { TAIL ~ order } to form a shock absorbing edge
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH