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托北工业公司声称一座30吨的直流电弧炉在它的丰桥工厂投入了商业性生产,经一家西德公司的专利许可,日本钢管公司制造和提供了该直流电弧炉,该炉装有一根直径为18英寸的电极和一个空气冷却的底部电
Tobe North Industries claims that a 30-tonne DC EAF is commercially produced at its Toyohashi plant and was manufactured and supplied by Nippon Steel Company under a license from a West German company that houses a 18-inch diameter electrode and an air-cooled bottom