They may form concentrated pockets in gravels . 它们可能在砾石堆积物中形成富集的矿囊。
How are metals concentrated . 金属是怎样富集的?
The concept of regional uranium enrichment has been discussed by davidson, saum and link . 戴维森、索姆和林克等论述了区域性铀富集的条件。
Relationship between nose structures and oil - gas enrichment in chezhen sag 车镇凹陷鼻状构造与油气富集的关系
Geological conditions and characteristics of various energy resources coexisted and enriched in same basin 多种能源矿产同盆共存富集的地质条件及其特征
Effect of dietary polyunsaturated fatty acids on performance and composition of yolk lipids in layer hens 日粮多不饱和脂肪酸类型对蛋鸡生产性能和蛋黄脂肪酸富集的影响
Results indicated that mn , fe , al were the main elements consisting in the darkened coating of the sand media 研究表明:石英砂滤料表面的黑化物质主要是锰、铁、铝等金属元素富集的结果。
Stationary source emissions - automated monitoring of mass concentrations of particles - performance characteristics , test methods and specifications 固定辐射源.颗粒质量富集的自动监控.性能特性试验方法和规范
Combination types of coexistent multiple energy resources in the ordos basin and an analysis of the upper paleozoic sedimentation control mechanism 鄂尔多斯盆地多种能源共存富集的组合形式及上古生界沉积控制机制分析
The leaves and stems of c . demersum l . may contain 137 . 8mg / kg ( dry weight ) of copper , so it can be served as hyperaccumulators of copper 金鱼藻体内富集的铜含量达到137 . 8mg kg (干基) ,符合超级铜积累植物的标准。