N－（对位取代苯基）氮杂15冠5
N-(p-substituted phenyl) nitrogen-hetero-15-crown-5
N-对位取代苯基马来酰亚胺
N-p-substituted phenyl maleimide
八度二部复对位
Double counterpoint in the octave
对位芳纶
Poly(p-phenylene terephthalamide
aramid1414
p-aromatic fibers
para-aromatic fiber
aramid fiber
poly(p-phenylene terephthalamide) fiber
Para-aramid Fiber
para aramid
aramid 1414
P-aramid
PPTA
PPTA fiber