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现在已进入相当十八世纪的产业革命新时期,各产业部门都在积极进行研究开发工作。在这种形势下,有用矿物资源出现了新的用途。例如,在超大规模集成电路技术方面,镓已用于核磁共振医疗器;在线性电车技术方面,铌已用于超高性能磁石;在激光发光粒子技术方面,也开始应用稀土元素。预测到2000年,被利用的稀有金属的种类和数量将更加扩大,其中镓的需要量将增加100倍,铌将增加40倍,稀土元素将增加
Now it has entered a fairly eighteenth century industrial revolution, a new era, all industry departments are actively carrying out research and development work. In this situation, there is a new use of useful mineral resources. For example, gallium has been used in nuclear magnetic resonance (HEI) medical devices for VLSI technology, ultrahigh performance magnets for linear tram technology, and rare earth elements for laser light-emitting particle technology. It is predicted that by the year 2000, the types and quantities of rare metals to be utilized will be further expanded. The demand for gallium will increase 100 times, that for niobium will increase 40 times and that for rare earth elements will increase