铀金属质量浓度梯度变化规律明显；
The change of the mass concentration gradient of uranium metal is obviously regular.
电沉积过程中副反应很少，因此得到的金属质量很高。
Electro deposition processes very few side effects, so get the metal of high quality.
针对回转式空气预热器的传热特性进行了理论分析，并应用金属质量流量的概念，建立了空气预热器的实时仿真模型。
The heat transfer performance of regenerative air preheater is analysed and the real time simulating model is created on the basis of the conception of metal flow.
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