Using the method of compare experiment, the samples of liquid al alloy with and without treatment by electromagnetic pump were studied respectively.
通过对比实验的方法，研究了不经过和经过电磁泵处理的铝合金液浇注流动性试样。
The optimizer will compare the cost of each method to determine the best one to use.
优化器将比较每种方法的成本，确定使用最好的一种。
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