诺次已经决定了，安装电子蜂鸣器相对来说不算普遍的法律执行技术。
When Knotts was decided, installing an electronic beeper was a relatively unusual law-enforcement technique.
他们把烙铁和布线的需要，把复杂的电子元件为基本模块如开关、电机、连接器、传感器和蜂鸣器。
They do away with the need for soldering irons and wiring and break down complex electronic components into fundamental blocks such as switches, motors, connectors, sensors and buzzers.
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