早在十九世纪,就已经有人开采和使用某些稀有金属材料。然而,使用范围很窄,开采规模也很小。在两次世界大战时期,稀有金属材料工业有了-些发展,但规模并不很大,还是处于萌芽时期。从1950年以后,稀有金属工业才进入了新的发展阶段。随着喷气式飞机、火箭技术、自动化、原子能等工业的发展,稀有金属工业也正在飞跃发展着。很明显,稀有金属工业的发 As early as the 19th century, some rare metals have been mined and used. However, the use of a very narrow range of mining is also very small. During the two world wars, there was some development in the rare metal materials industry, but the scale was not very large or in its infancy. Since 1950, the rare metal industry has entered a new stage of development. With the development of jets, rocket technology, automation, atomic energy and other industries, the rare metal industry is also leaping forward. Obviously, the rare metal industry hair