annular cross-section的意思|示意

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。