通过已知顺序实弹射击取样,显微观察弹头上发射过程中形成的痕迹,从中发现与排序有关的痕迹,然后通过统计、分析和归纳研究,发现弹头进膛时形成的痕迹及其形态变化,可以判断六四手枪发射子弹的顺序。 By means of a known sequence of live-fire sampling, microscopically observing the traces formed during the launch of the projectile and finding the traces related to the sorts, and then through the statistics, analysis and induction studies, the marks and morphological changes of the projectile entering the cavity were found, Can determine the order of the bullets firing bullets.