排烟
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airiness and eject smoke 通风排烟
prevent-eject smoke system 防排烟系统
Additionally, because the ejection port on the bullpup rifle is very close to the user's face, the user would feel greater sound, blast and smoke effects when spent casings eject.
另外，因为无托步枪退壳口非常接近使用者的面部，当废弹壳跳出时使用者感到非常大的声音、气浪和烟尘。
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