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Loop Card Addressable Fire Alarm System Alarm Control Panel - China Addressable Fire Alarm System, Fire Alarm Control Panel | Made-in-China.com
E-Circuits Helper - Simple Wire Loop Alarm Circuit Schematic for door security. Components for Wire Loop Alarm Circuit Schematics 1. Transistor (BC548) 2. Resistor (10K) 3. Buzzer 4. Battery(9V) Working of burglar
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