A pulsed extraction column with an annular cross section can successfully provide large-cross-section and can be made critically safe for nuclear operation.
具有环状截面的脉冲萃取柱可以有效地提供更大的柱截面积，并且保证核燃料的临界安全。
It is found that there is a secondary flow on the annular cross section.
结果表明：环形截面上存在二次流。
It is found that the secondary flow are taken place on the annular cross section.
结果表明环形截面上存在二次流动。
It is found that the secondary flow are taken place on the annular cross section.
结果表明环形截面上存在二次流动。
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