They will fire off a signal flare.
他们将发射一枚信号弹。
Signal flare - Actual igniting signal flare in your pocket, which is pretty neat.
信号弹功能-在您的口袋里就可以“点燃”信号弹，相当环保。
The launching height is an important technical parameter for the signal flare.
信号弹的发射高度是信号弹的重要技术参数。
The launching height is an important technical parameter for the signal flare.
信号弹的发射高度是信号弹的重要技术参数。
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