Labels:text | screenshot OCR: BURGLAR ALARM T THIS BURGLAR ALARM uses a magnetic sensor to detect the opening of a window. A permanent magnet is mounted on the window next to a special switch on the frame. When the METAL BAR window is closed, the magnet attracts a metal bar, keeping the switch on. But if the magnet is moved, the switch opens and activates the alarm bell. SPRING BREAK IN! ALARM BELL SEE SWITCH MAGNET ALSO
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