Poly para phenyleneterephthalamide compositions, their preparation and {HEAD ~ a process} for {TAIL ~ the production} of fibres from these compounds 
for
Poly para phenyleneterephthalamide compositions , their preparation and { HEAD ~ a process } for { TAIL ~ the production } of fibres from these compounds
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH