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  2. Floodgate - Wikipedia

    en.wikipedia.org/wiki/Floodgate

    Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems. They may be designed to set spillway crest heights in dams , to adjust flow rates in sluices and canals , or they may be designed to stop water flow entirely as part of a levee or storm surge system.

  3. Barrier transfer machine - Wikipedia

    en.wikipedia.org/wiki/Barrier_transfer_machine

    Sophisticated models can be customized for their application and local road characteristics (grades, curves, etc.). Hydraulically adjustable units and computerized steering guidance systems in such models further aid in accurate transfer vehicle movement and barrier placement. [10] Permanent, sophisticated units can cost around US$1 million each.

  4. Four-quadrant gate - Wikipedia

    en.wikipedia.org/wiki/Four-quadrant_gate

    A four-quadrant gate or full-barrier equipment is a type of boom barrier gate protecting a grade crossing. It has a gate mechanism on both sides of the tracks for ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Kaplan turbine - Wikipedia

    en.wikipedia.org/wiki/Kaplan_turbine

    A Bonneville Dam Kaplan turbine after 61 years of service. The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, [1] who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level.

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