Optimum Ratio is obtained by orthogonal test and variance analysis for different factors and levels.
通过对型砂各因子和水平的正交试验和方差分析，得出了最佳的配比。
On this basis, the orthogonal test of leaded brass C3602 was made on the domestic lathe CD6140A and the influence of various factors and levels on surface roughness was analyzed.
以此为基础，在国产CD 6140a型车床上对C3602铅黄铜进行了正交切削试验，分析了各因素水平对工件表面粗糙度的影响。
Method: The orthogonal test of four factors at three different levels were used.
方法：采用四因素三水平的正交试验法，筛选静脉穿刺涂剂的配方。
Method: The orthogonal test of four factors at three different levels were used.
方法：采用四因素三水平的正交试验法，筛选静脉穿刺涂剂的配方。
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