Generally used particle grade technique is semi empirical method, it determines results according to experiments, which needs quite an amount of work.
常用的颗粒级配方法主要是半经验法，依靠实验来确定，工作量大。
Generally used particle grade technique is semi empirical method, it determines results according to experiments, which needs quite an amount of work.
常用的颗粒级配方法主要是半经验法，依靠实验来确定，工作量大。
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