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- 29 oktober 2012 kl. 21.29 (skillnad | historik) . . (+3 129) . . N SpearLipton739 (Skapade sidan med 'How Does Burglar Alarms Operate Wired alarms are nearly extinct. Wireless burglar alarms operate by either of the two indicates, nowadays. 1.Connected by radio frequency 2....') (senaste)