The delta structures 200 have a lattice 210 of {HEAD ~ interconnected strands} which intersect to define {TAIL ~ a plurality} of cells 220 
intersect to define
The delta structures 200 have a lattice 210 of { HEAD ~ interconnected strands } which intersect to define { TAIL ~ a plurality } of cells 220
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH