{HEAD ~ The present invention} relates to {TAIL ~ 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 
relates to
{ HEAD ~ The present invention } relates to { TAIL ~ 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
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