Maintaining his situational awareness, Staff Sgt. Miller immediately jumped into his vehicle's turret and engaged the enemy with its mounted MK19 40mm automatic grenade launcher.
The paper designs an automatic alarm with the time delay function which composed by the microwave launcher, 555 timers, the voltage comparator and the relay.
设计了一个由微波发射器、555定时器、电压比较器和继电器组成的具有延时功能的自动报警器。
3
The XM29 was intended to be a shoulder-fired, semi-automatic grenade launcher in 20 mm calibre and to incorporate a compact, lightweight 5.56 mm rifle as a back-up weapon.