已经有次观看 wencong在2013-07-05发布

Channel：Rare Earth 标签： Rare  earth,What  is  Rare  Earth 

简介：rare earth is the chemical periodic table of lanthanides - lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd ), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and the lanthanide elements 15 are closely related to two elements - scandium (Sc) and yttrium (Y) of 17 kinds of elements, called rare earth elements (Rare Earth). Referred rare earth (RE or R).