{TAIL ~ A process} 1, in which the reaction of the terephthaloyl chloride with {HEAD ~ the para phenylenediamine solution} is carried out continuously 
{ TAIL ~ A process } 1 , in which the reaction of the terephthaloyl chloride with { HEAD ~ the para phenylenediamine solution } is carried out continuously
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH