复合氨基酸稀土元素螯合物
compound amino acid rare earth chelate
痕量稀土元素
trace rare earth elements
矿物微量和稀土元素
trace and rare earth elements of mineral
轻稀土元素
light rare earth element
light rare earth elements LREEs
artificial fracture
铈组稀土元素
cerium-group rare earth elements
cerium-group rare earth element
cerium subgroup rare earth elements
微量稀土元素
minor-alloying element RE
微量稀土元素各分量的测定
determination of partical amount for trace rare-earth element
稀土和非稀土元素
rare earth elements lnon rare earth elements