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Through analysing the basic principle of materials axial movement when they ve selected in the grid cylindrical screen, this article provides the calculating method of materials axial movement in the screen.

本文分析了栅条圆筒筛分选物料时筛筒内物料轴向运动的基本规律，提出了筛筒内物料轴向移动的计算方法，找出了影响物料轴向移动的主要因