七种9mm手枪射击弹壳的痕迹研究
吕晓森1, 田富睿1, 刘思冶2

Marks on Cartridge Cases Shot from Seven-kind 9mm Pistols and Their Forensic Value
LÜ Xiaosen1, TIAN Furui1, LIU Siye2
NP22手枪的射击弹壳痕迹(a:击针头痕迹;b:抛壳挺痕迹;c:抱壳槽痕迹;d:拉壳钩痕迹;e:弹匣口刮擦痕迹)