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通过对针式与激光打印机的工作原理及印泥印文特征的分析，应用扫描电子显微镜对计算机打印机字迹与印泥印文交叉先后顺序进行检验，寻找出鉴别计算机打印机字迹与印泥印文交叉先后顺序的判定依据。
Through the working principle of the stylus and the laser printer and the analysis of the features of the imprinting seal, the paper examines the order of the cross between the imprinting of the computer printer and the imprinting with the scanning electron microscope to find out the order of distinguishing between the writing of the computer printer and the imprinting of the inkpad Judgment basis.