The change of the mass concentration gradient of uraniummetal is obviously regular.
铀金属质量浓度梯度变化规律明显；
2
The behavior of uraniummetal in rolling mills was considered as a viscous flow. Then the differential equation for rolling pressure was established.
把轧制中的金属运动看作粘性流动，建立了轧制压力微分方程；
3
After exposure to carbon monoxide, contents of oxygen in the surface oxides of uraniummetal and U3O8 are decreased and O/U ratios decrease 7. 2% , 8.0% respectively.