1) firing pin mark
击针头痕迹
2) hitting marks
打击痕迹
1.
The acting force of prying and pressing marks is leverage effect which is different from that of hitting marks,impact effect.
撬压痕迹与打击痕迹的作用力形式不同,分别是杠杆作用和碰撞作用。
3) bullet engraving
弹头痕迹
1.
Analysis and comparison of bullet engraving are important for criminal investigation and the discovery of evidence in gun related case.
弹头痕迹的分析与比对是破获涉枪案件的关键,目前国内外在这方面主要采用对弹头痕迹的几何形态、位置及线条进行比对的方法。
4) firing-pin impression
冲击磨损痕迹
1.
By collecting the images of the cartridge cases shot by four kinds of guns,it was found that the circumference of the firing-pin impression appeared as an irregular jigsaw shape,showing its nonlinear nature and fractal characteristics.
对4种枪支发射的弹壳进行图像采集,经观察发现冲击磨损痕迹周边均为锯齿状不规则形态,表明其是非线性的且具有分形特征;应用分形理论的周长-面积公式和最小二乘法原理,对所采集的4种枪支的冲击磨损痕迹图像进行分析计算的结果表明,枪种不同,所配用击针头的形状、尺寸不同,冲击磨损痕迹图像的分形维数值也不同,因此可以用分形维数来描述弹壳上不同枪支的冲击磨损痕迹特征,从而为冲击磨损痕迹的量化检验作出初步的探索。
5) the impress of the introductory needle
导针印压痕迹
6) barring stitch
固线头针迹
补充资料：针头
1.针尖。借指绣针。 2.安在注射器上的针状金属管。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条