This paper suggests that appropriate formulas should be chosen for the calculation of screening classification efficiency according to concrete screening conditions.
本文提出不同筛网条件下应选取不同的计算筛分分级效率的公式。
Digital pulse demagnetizer has better demagnetizing effect and can increase the efficiency of classification and screening.
数字脉冲脱磁器是一种新型脱磁器，其脱磁效果好，明显提高。
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