论文以模型试验为手段，通过正交试验设计完成上述内容的试验研究。
The thesis applied model experiment, and finished the study contents above through orthogonal experimental design.
本文通过正交试验设计了最佳的合金成分，并简要介绍了合金的生产工艺。
In this paper the Optimum amounts of alloying elements were designed through the orthogonality test. The brief recommendation of process of production was also presented.
通过正交试验设计，采用粉煤灰代砂法掺入再生混凝土，并进行配合比设计。
In this paper, the writer chose the adding means of PFA replacing sand, and put forward the mix ratio design of concrete by orthogonal analysis experiments.
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