Therefore, the criticalgrade to achieve a balance between mining and filling is a significant indicator to evaluate whether the system is perfect.
因此，采充平衡临界品位是评价该系统是否完美的重要指标之一。
2
An accelerator driven sub critical fast reactor (ADSFR) was used to study the Pu burning of weapons grade.
选取加速器驱动次临界快堆(ADSFR)进行燃烧武器级钚研究。
3
Calculation for short columns using Grade Q235 steel tube filled with Grade C30 concrete indicates that the critical diameter to thickness ratio of steel tubes is about 1700.