Another object of the present invention is to provide a laser screen having a relatively large cross-sectional area for checking the velocity of a projectile having unstable flight trajectories.
本发明的另一个对象是提供了一种激光屏幕设备，检验的弹丸速度所提供的最低限额相机覆盖干扰飞行。
Another object of the present invention is to provide a laser screen having a relatively large cross-sectional area for checking the velocity of a projectile having unstable flight trajectories.
本发明的另一个对象是提供了一种激光屏幕设备，检验的弹丸速度所提供的最低限额相机覆盖干扰飞行。
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