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入侵探测器是入侵报警系统的前端设备,通过探测现场状态或某种物理参数的变化来发现入侵者,并发出报警触发电信号通
Intrusion detectors are the front-end equipment of the intrusion alarm system. They detect the intruder by detecting the change of the field status or some kind of physical parameters and send an alarm to trigger the electrical signal transmission