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2. Electric gate - Wikipedia

   en.wikipedia.org/wiki/Electric_gate

   Electric gates alone, however solid and imposing they may be, cannot guarantee a completely secure environment electric locks, are often needed to boost the locking effectiveness of the gate motors. Electric gates are recommended to be used in combination with other security features to install a full security system .

3. Electric fence - Wikipedia

   en.wikipedia.org/wiki/Electric_fence

   Electric fencing to protect a walkway against wildlife. Pilanesberg Game Reserve, South Africa A wolf jumping over an electric fence only touching the positive pole not getting an electric shock Electric fence with a danger electricity Warning Sign on it, around an animal cage. Electric fences are useful for controlling the movements of wild ...

4. Automatic Systems (company) - Wikipedia

   en.wikipedia.org/wiki/Automatic_Systems_(company)

   Turnstiles, swing gates and security doors are installed in the hall of office buildings, public and private administrations, industries, leisure and sports centers. Passenger access control. Automatic access control gates, ePassport gates and anti-reflow doors are mainly installed in Metro/Tram stations, [24] airports, railway, bus and ferry ...

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6. Category:Types of gates - Wikipedia

   en.wikipedia.org/wiki/Category:Types_of_gates

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7. Four-quadrant gate - Wikipedia

   en.wikipedia.org/wiki/Four-quadrant_gate

   The exit gates blocking the road leading away from the tracks are equipped with a delay, and begin their descent to their horizontal position several seconds after the entrance gates do, so as to avoid trapping highway vehicles on the crossing. In the United Kingdom, the exit-side barriers do not lower until the entrance-side barriers have lowered.