东方钽业：主要从事稀有金属钽、铌及合金等的研发、生产、销售和进出口业务

Group 1 - The company, Dongfang Tantalum Industry, primarily engages in the research, production, sales, and import-export business of rare metals such as tantalum, niobium, and their alloys [1] - The company does not involve itself in the tungsten industry [1]