Meanwhile, there is a low content of compound in unthickened polynuclear aromatic hydrocarbon (PAH) and pah mix which both are poor in chemical stability.
化学不变性差的非稠环芳烃、混环芳烃化合物含量减小。
Meanwhile, there is a low content of compound in unthickened polynuclear aromatic hydrocarbon (PAH) and pah mix which both are poor in chemical stability.
化学不变性差的非稠环芳烃、混环芳烃化合物含量减小。
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