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  2. Electric gate - Wikipedia

    en.wikipedia.org/wiki/Electric_gate

    A sliding electric gate with electric motor and backup battery in case of mains failure. Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way. Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or ...

  3. Bar gate - Wikipedia

    en.wikipedia.org/wiki/Bar_gate

    Bar gate. Animation of level crossing booms lowering in Queensland, Australia. A bar gate in the Netherlands. A bar, post, pole, beam, or boom gate, [1] also known as a boom or a boom barrier, [2][3][4][5] is a beam or bar on a pivot used as a gate. The boom is lowered to block vehicular or pedestrian access through a controlled point or raised ...

  4. Turnstile - Wikipedia

    en.wikipedia.org/wiki/Turnstile

    Turnstile. A turnstile (also called a gateline, baffle gate, automated gate, turn gate in some regions) is a form of gate which allows one person to pass at a time. A turnstile can be configured to enforce one-way human traffic. In addition, a turnstile can restrict passage only to people who insert a coin, ticket, transit pass, security ...

  5. Gates Corporation - Wikipedia

    en.wikipedia.org/wiki/Gates_Corporation

    gates.com. Gates Corporation sign at company headquarters in 1144 Fifteenth, Denver, Colorado. Gates Industrial Corporation plc, based in Denver, Colorado, is a manufacturer of power transmission belts and fluid power products, which are used in diverse industrial and automotive applications. [1] The company employs over 15,000 and has sales ...

  6. Automated border control system - Wikipedia

    en.wikipedia.org/wiki/Automated_border_control...

    The typical work-flow of an automatic border control system (eGate) [1] Automated border control systems (ABC) or eGates are automated self-service barriers which use data stored in a chip in biometric passports along with a photo or fingerprint taken at the time of entering the eGates to verify the passport holder's identity.

  7. Barbed wire - Wikipedia

    en.wikipedia.org/wiki/Barbed_wire

    Barbed wire. Barbed wire, also known as barb wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is the construction of inexpensive fences, and it is also used as a security measure atop walls surrounding property. As a wire obstacle, it is a major feature of the ...

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