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