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