1)signal flare,信号弹2)flare tube,信号弹筒3)lifesaving signal detonator,救生信号弹4)smoke signal bomb,烟幕信号弹5)the signal rocket with pulsed-flash frequency,脉冲频闪信号弹6)singal,信号
用法例句
Since the lifesaving signal detonator is an essential marine lifesaving appliance in the merchant ships,its quality is critical to personal safety.
