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七七式手枪是我国自行设计制造的较先进的自卫武器。该枪在发射过程中弹壳中部遗留有一环形突起压痕(简称环槽痕),有关教材和文章均有论述,但对环槽痕表面遗留的细小擦划痕迹还未见报导。本文通过对环槽痕上细小擦划痕迹的观察、比对分析、统计,就痕迹的形成机理、出现率、稳定性、变化规律、鉴定价值及检验中的一些问题进行了实验探讨。
77 pistol is designed and manufactured by our own more advanced self-defense weapons. The firing process in the middle of the shell left a ring-shaped indentation indentation (referred to as ring groove marks), the textbooks and articles are discussed, but traces of scratches left on the ring groove surface has not been reported yet. In this paper, through the observation and comparative analysis of small scratches on ring groove marks, comparative analysis and statistics, the formation mechanism, appearance rate, stability, variation, appraisal value and some problems in inspection are discussed.