当击发完成后，弹壳被抛出枪膛，枪机的退壳 (Extractor)、撞针 (Firing Pin) 和抛壳顶杆 (Ejector) 等部件都会在弹壳上留下独特的记号。所以弹壳就象人的指纹一样，可以有效地用来辩识发射枪枝的身份。
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Inertia firing pin 惯性撞针
floating firing pin 型号接纳浮动撞针
firing pin retaining pin 击针止动销 ; 击针固定销钉
spring-activated firing pin 弹簧推动式击针
firing-pin group 击发装置
Locks Firing Pin 门锁撞针
N the part of the firing mechanism of a firearm that ignites the charge by striking the primer (枪的)撞针
So she took the firing pin out of the gun.
所以，她把枪里的撞针卸了出来。
See, the firing pin is the key to the whole case!
瞧，那撞针是整个枪的关键！
However, the related research is rarely reported on the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture.
但当前对该类型喷嘴加湿性能的相关研究还较少见诸报道。
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