The present invention relates to {HEAD ~ 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 
The present invention relates to { HEAD ~ 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
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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