知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 One sizeable REE application is long term magnets, without the need of which wind turbines wouldn’t convert and EV motors would stand even now. REEs happen routinely inside the Earth’s crust but only in pretty tiny concentrations in comparison to metals for instance iron, copper or gold. The https://www.friend007.com/post/565597_molybdenum-is-a-refractory-metal-with-exceptional-strength-and-heat-resistance-p.html