超音波法液位元元元元元元测定
ultra-sonic method of liquid meaduremert
元素分布分析
Distribution analysis of elements
氮素分布特征
nitrogen distribution characteristics
成矿元素分布
distribution of ore-forming elements
地壳元素分布
geochemical distribution pattern
分散元素分布规律
distribution pattern of disperse element
金属元素分布
distributions of metallic elements
矿质元素分布
distribution of mineral element
mineral elements
生命元素特征
benefical or harmful element
特征元素约束
restriction of characteristic element
微量元素特征
micro-element characteristics
trace elements characteristics
trace element
trace elements
稀土元素分布
rare-earth element distri bution
稀土元素分布模式
distribution patters of REE