Fiber of {HEAD ~ wholly aromatic copolyamide} from {TAIL ~ 2,6 naphthalene dicarboxylic acid} and 3,4 diaminodiphenylether 
from
Fiber of { HEAD ~ wholly aromatic copolyamide } from { TAIL ~ 2,6 naphthalene dicarboxylic acid } and 3,4 diaminodiphenylether
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH