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为建立前置物射入口与典型射入口的检验鉴别方法，使用国产54式7.62mm口径手枪及56式7．62mm口径半自动步枪，以3m的距离射击约克夏种白猪义3只，同时以各种玻璃、木板。汽车门、动物躯干等物质作为中间障碍物，制成前置物射入口36例，并与对照组6例射入口进行对比观察。结果显示，前置物射入口较典型射入口增大，撕裂，创线挫伤增宽，创周出现卫星创或假点彩，创道内异物及弹头严重变形。此检验诊断方法有助于法医在实际检验中对射击距离的判断和对现场环境的分析。
In order to establish the method of inspection and identification of the front entrance and the typical entrance, three Yorkshire white piglets were shot at a distance of 3m with a domestic 54 7.62mm caliber pistol and a 56 7.62mm caliber semi-automatic rifle. At the same time, Glass, wooden board. Car doors, animal torso and other substances as an intermediate obstacle, made of 36 cases of anterior portal injection, and compared with the control group of 6 cases of injection port contrast observation. The results showed that the entrance of the antecedent was larger than that of the typical entrance, and the tearing and broaden the contusion of the wound wire. Satellite or false spot color appeared on the wound, and the foreign body and bullet in the avenue were severely deformed. This test diagnostic method helps forensic in the actual test to determine the firing range and on-site analysis of the environment.