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Your Enemy and Your Vulnerability
Doors Locks and Keys
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alarm sensors alarm system apartment building Archie areas backup bars battery better Better Business Bureau bolts burglar button call the police circuit sensors closed circuit concealed connected control unit crime criminal Curtis Sliwa cylinder deadbolt defeat detector devices door frame easily electronic equipment false alarms fastening Figure fire escape garage door gate glass guard plate hardware high-security hinges holes house or apartment inside installed insurance company intruder key locks key-operated keyswitch landlord latch leave light locking devices loop Mick Davis mortise mortise lock motion detector mounted necessary never open circuit operated padlock pane patrol percent perimeter system possible premises prevent primary lock protection relay reliable removed replaced require resistor roll-up safe safe deposit box sash screws sirens someone sound steel sure surface mounting switch tampering tenants theft Tiffy tool trigger the alarm usually vulnerable weapons window wire