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  2. Ball valve - Wikipedia

    en.wikipedia.org/wiki/Ball_valve

    A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. [1]

  3. Valve - Wikipedia

    en.wikipedia.org/wiki/Valve

    Schematic 3 way ball valve: L-shaped ball right, T-shaped left. Valves with three ports serve many different functions. A few of the possibilities are listed here. Three-way ball valves come with T- or L-shaped fluid passageways inside the rotor. The T valve might be used to permit connection of one inlet to either or both outlets or connection ...

  4. Glossary of nautical terms (M–Z) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    A flat-bottomed boat with a square-cut bow designed for use in small rivers or other shallow water and typically propelled by pushing against the riverbed with a pole. In this way it differs from a gondola, which is propelled by an oar. punting Boating in a punt. purchase A mechanical method of increasing force, such as a tackle or lever. [2 ...

  5. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Rotary valves and piston valves: parts of brass instruments used to change their pitch; Rotolock valve; Rupture disc: a one-time-use replaceable valve for rapid pressure relief, used to protect piping systems from excessive pressure or vacuum; more reliable than a safety valve; Saddle valve: where allowed, is used to tap a pipe for a low-flow need

  6. 98 Historical Inventions That Were Ahead Of Their Time - AOL

    www.aol.com/98-historical-inventions-were-ahead...

    When the user inserted a coin, it triggered the levers to open a valve and pour out a small amount of holy water. Image credits: Isabella Thornton #5 A Remote-Controlled Lawnmower

  7. Glossary of nautical terms (A–L) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    1. A towed or self-propelled flat-bottomed boat, built mainly for river, canal or coastal transport of heavy goods. 2. Admiral ' s barge: A boat (or aircraft) at the disposal of an admiral (or other high ranking flag officer) for his or her use as transportation between a larger vessel and the shore, or within a harbor. In Royal Navy service ...

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