The side edges 2 slope inward from {HEAD ~ the top} of {TAIL ~ the body board} T to the bottom surface B 
of
The side edges 2 slope inward from { HEAD ~ the top } of { TAIL ~ the body board } T to the bottom surface B
OTH 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