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Niobium Oxide
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Kunshan, Seoul Chemical Co. (Seoul, Shanghai Chemical Co.)
Treibacher Industrie Inc
Jiangsu Jincheng Reagent Ltd.
Hebei Shuangchi Biological Technology Co.,Ltd
Jichuang Trade Co.,ltd
Tropag Oscar H. Ritter Nachf. GmbH
Dongguan Ruizhi New Material Technology Co., Ltd.