The synthetic fibers thus function as a reinforcing web or {HEAD ~ backbone} to maintain some mechanical integrity and {TAIL ~ strength} of the paper 
to maintain
The synthetic fibers thus function as a reinforcing web or { HEAD ~ backbone } to maintain some mechanical integrity and { TAIL ~ strength } of the paper
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH