已经有次观看 wencong在2013-07-03发布

Channel：Rare Earth 标签： Rare  earths,Rare  Exports 

简介：Rare 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).