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Tangshan Zhonghao POM Zhcc K90-1 K90-a K90 K270 Polyoxymethylene Acetal Resin Polyformaldehyde POM Pellets, POM, Tangshan POM

Tangshan Zhonghao POM Zhcc K90-1 K90-a K90 K270 Polyoxymethylene Acetal Resin Polyformaldehyde POM Pellets, POM, Tangshan POM