said bottom section conforming generally to {HEAD ~ the shape} of {TAIL ~ the body board} and having a relatively smooth and slippery bottom surface 
of
said bottom section conforming generally to { HEAD ~ the shape } of { TAIL ~ the body board } and having a relatively smooth and slippery bottom surface
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH