The wide-angle sky screen can be used for measuring the terminal velocity of the projectile, and providing synchronous signal for other trajectory measurement apparatus as the trigger device of the .
该装置可以用来测试弹丸末速，作为较大靶面的触发装置，为其他弹道测试仪器提供同步信号。
The wide-angle sky screen can be used for measuring the terminal velocity of the projectile, and providing synchronous signal for other trajectory measurement apparatus as the trigger device of the .
该装置可以用来测试弹丸末速，作为较大靶面的触发装置，为其他弹道测试仪器提供同步信号。
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