The optimum preparation conditions were selected with orthogonal design combined with multi-index test.
通过正交实验结合多指标综合评价法优选最佳制备工艺。
The economical aspects of the combined process, resulting from the preparation of some feasibility studies, are also briefly discussed.
此外，本文也简要讨论了从准备可行性研究所得到的联合工艺的经济方面的情况。
The preparation of nanometer copper powder by chemical reduction combined with homogeneous precipitation method is studied.
研究了以化学还原法与均匀沉淀法相结合的方法制备纳米铜粉。
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