| | | 国占生产份额过半的"风险元素"大多 | | | | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | 由中国掌控 | | | | | | | | | | | | | | | | | 稀有金属 | | | | | | | | | | | | | | | | | 产量少,提取困难。按照日本经济产业省的定 | | | | | | | | | | | | | | | | | 义. 包括稀土在内的55种元素是稀有金属 | | | | | | | | | | | | | | | | | 稀土=工业的维生素 | | | | | | | | | | | | | | | | | 17种元素的总称。只需少量添加,就能提高耐 | | | | | | | | | | | | | | | | | 热性和强度 | | | | | | | | | | | | | | | H | | 中文网 | | | | | | | | | | | ...