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用自行设计的实验装置真实描述出无缝管轧制变形区内单位轧制力，纵、横向摩擦力的分布规律，绘制出变形区各点的摩擦力分布和金属流动轨迹图。
The self-designed experimental device is used to describe the distribution law of the unit rolling force, longitudinal and transverse friction force in the deformation zone of the seamless tube. The friction distribution and the metal flow trajectory map of each point in the deformation zone are plotted.