tantalum and niobium ore meaning in English

钽铌矿砂

Methods for chemical analysis of tantalum and niobium ores - determination of niobium content - preconcentration and separation with silica gel - thiocyanate extraction photometric method
钽矿石铌矿石化学分析方法硅胶富集分离-硫氰酸盐萃取光度法测定钽量
Methods for chemical analysis of tantalum and niobium ores - determination of tantalum content - preconcentration and separation with silica gel - butyl rhodamine b extraction photometric method
钽矿石铌矿石化学分析方法硅胶富集分离-丁基罗丹明b萃取光度法测定钽量