Checking the reaction of power alarm circuit.

检查电源报警电路是否起作用.

The infrared anti-theft alarm, consisting of an infrared detection circuit and an alarm circuit, is a practical self-defense deterrence warning tool.

红外线现场防盗报警器由红外探测电路及报警电路组成，是一种实用的自卫队性威慑报警工具。

The utility model relates to an alarm zipper which is composed of a zipper and an alarm circuit. The alarm zipper belongs to the field of the human necessities.

本实用新型是一种由拉链和报警电路组成的报警拉链，属人类生活需要领域。

The paper provides us with the idea of using photoelectricity reflective on-off switch to control alarm circuit with the characteristics of high sensitivity and favourable concealment.

利用反射式光电开关的电路的通断来控制报警电路，有灵敏度高、隐蔽性好的特点。