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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. List of Chromebooks - Wikipedia

    en.wikipedia.org/wiki/List_of_Chromebooks

    Retrieved August 15, 2014. ^ "Samsung Chromebook 2 13.3" product page". samsung.com. Samsung. Retrieved August 15, 2014. ^ a b c "Tegra K1 Lands in Acer's Newest Chromebook". Anandtech. 2014-08-11. ^ "Acer Chromebook 11 C730". Acer. ^ "HP's bright new Chromebooks include $280 Chromebook 11 and $300 Chromebook 14".

  4. Box-drawing characters - Wikipedia

    en.wikipedia.org/wiki/Box-drawing_characters

    Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes. These characters are characterized by being designed to be connected horizontally and/or vertically with adjacent characters, which requires proper alignment.

  5. AltGr key - Wikipedia

    en.wikipedia.org/wiki/AltGr_key

    AltGr key. The AltGr key is the first key to the right of the space bar. AltGr (also Alt Graph) is a modifier key found on many computer keyboards (rather than a second Alt key found on US keyboards). It is primarily used to type special characters and symbols that are not widely used in the territory where sold, such as foreign currency ...

  6. File:Check Valve.svg - Wikipedia

    en.wikipedia.org/wiki/File:Check_Valve.svg

    File:Check Valve.svg. Size of this PNG preview of this SVG file: 512 × 341 pixels. Other resolutions: 320 × 213 pixels | 640 × 426 pixels | 1,024 × 682 pixels | 1,280 × 853 pixels | 2,560 × 1,705 pixels. Original file ‎ (SVG file, nominally 512 × 341 pixels, file size: 355 bytes) This is a file from the Wikimedia Commons.

  7. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    Engineering drawing abbreviations and symbols are used to communicate and detail the characteristics of an engineering drawing. This list includes abbreviations common to the vocabulary of people who work with engineering drawings in the manufacture and inspection of parts and assemblies. Technical standards exist to provide glossaries of ...

  8. British and American keyboards - Wikipedia

    en.wikipedia.org/wiki/British_and_American_keyboards

    Apple supplies a British keyboard layout, which has some differences with the UK Windows layout: The " and @ keys are swapped. The € symbol is assigned to ⌥ Option+ @ 2, rather than ⌥ Option+ $ 4. The # symbol is assigned to ⌥ Option+ £ 3, rather than a dedicated key. The ¬ and ¦ dedicated key is absent. The ± and § dedicated key ...

  9. Computer keyboard - Wikipedia

    en.wikipedia.org/wiki/Computer_keyboard

    A computer keyboard is a peripheral input device modeled after the typewriter keyboard [1] [2] which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter -style keyboards have been the main input method for computers since ...