Black Polyimide Film manufacturer / supplier in China, offering Refined Pmda Crystal Fine Powder, High Purity Pyromellitic Dianhydride with Free Acid Content 0.1%-0.3%, 99.8% High-Purity Pyromellitic Dianhydride C10H2O6, Refined Pmda with CAS 89-32-7, Important Chemical Intermediate Refined Pmda, High Grade Pyromellitic Dianhydride, C10H2O6 and so on.
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