通过正交试验，给出影响RDX 丙酮重结晶粒度分级工艺的主要因素。

The principal factors affecting the grading process for the recrystallization of RDX from acetone are given through the orthogonal test.

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研究超细锌粉气流分级技术工艺条件对产品粒度的影响因素。

The effect of the technical parameters on the particle size of the superfine zinc powder from the air-classification is investigated.

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