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。
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.
XM 29确定为一种抵肩射击，20毫米口径单发自动榴弹发射器并结合一个紧凑型，重量轻的5.56毫米步木仓做为后备武器。
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.
XM 29确定为一种抵肩射击，20毫米口径单发自动榴弹发射器并结合一个紧凑型，重量轻的5.56毫米步木仓做为后备武器。
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