{TAIL ~ The present invention} relates to {HEAD ~ a polygonal rib structure} having ribs directed orthogonal to one plane and intersecting each other to form polygonal shapes, and particularly a shock absorbing polygonal rib structure 
{ TAIL ~ The present invention } relates to { HEAD ~ a polygonal rib structure } having ribs directed orthogonal to one plane and intersecting each other to form polygonal shapes , and particularly a shock absorbing polygonal rib structure
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH