... 粒度分类：grain size classification 粒度分级特性：sizing characteristic 粒度分级器分级器：classifier ...
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To evaluate the properties of alum and PAC used as AIDS of sizing, drainage and retention, it is necessary to study the charge characteristic of the stock added alum and PAC.
添加硫酸铝和聚合氯化铝的纸浆的电荷特征，是决定铝化物发挥功效的重要因素。
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