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  2. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

  3. Pumpjack - Wikipedia

    en.wikipedia.org/wiki/Pumpjack

    Depending on the size of the pump, it generally produces 5 to 40 litres (1 to 9 imp gal; 1.5 to 10.5 US gal) of liquid at each stroke. Often this is an emulsion of crude oil and water. Pump size is also determined by the depth and weight of the oil to remove, with deeper extraction requiring more power to move the increased weight of the ...

  4. List of preserved Southern Pacific Railroad rolling stock

    en.wikipedia.org/wiki/List_of_preserved_Southern...

    Static display, Grapevine Vintage Railroad, Grapevine, Texas 786: Mk-5 2-8-2: Undergoing restoration, Austin Steam Train Association, Austin, Texas: 794 Mk-5 2-8-2: Static display, Sunset Station, San Antonio, Texas: 975: F-1 2-10-2: Static display, Illinois Railway Museum, Union, Illinois: 982: F-1 2-10-2: Static display; Minute Maid Park ...

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  6. Double check valve - Wikipedia

    en.wikipedia.org/wiki/Double_check_valve

    A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

  7. Category:Austin, Texas navigational boxes - Wikipedia

    en.wikipedia.org/wiki/Category:Austin,_Texas...

    [[Category:Austin, Texas navigational boxes]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Austin, Texas navigational boxes]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.

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