The change of the mass concentration gradient of uranium metal is obviously regular.
铀金属质量浓度梯度变化规律明显；
The results show that, there was no influence of initial concentration on mass transfer coefficient;
结果表明，起始浓度与传质系数无关；
The results show that, there was no influence of initial concentration on mass transfer coefficient;
结果表明，起始浓度与传质系数无关；
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