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  2. Defy Appliances - Wikipedia

    en.wikipedia.org/wiki/Defy_Appliances

    Defy Appliances is a South African manufacturing company and is the largest manufacturer and distributor of major domestic appliances in Southern Africa. [1] The company manufactures and develops a range of large appliances from gas stoves , refrigerators , washing machines and tumble dryers to continuous clean ovens and convection ovens .

  3. Ultrasonic cleaning - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_cleaning

    Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).

  4. DEFY Wrestling - Wikipedia

    en.wikipedia.org/wiki/DEFY_Wrestling

    DEFY Wrestling is an American independent professional wrestling promotion based out of Seattle, Washington.DEFY was created in 2017 after founders Jim Perry and Matt Farmer successfully petitioned the Washington state government (specifically the Washington State Department of Licensing) to alter laws around professional wrestling, which they had argued had severely impacted the ability of ...

  5. Vacuum cleaner - Wikipedia

    en.wikipedia.org/wiki/Vacuum_cleaner

    In 1860 a manual vacuum cleaner was invented by Daniel Hess of West Union, Iowa. Called a "carpet sweeper", it gathered dust with a rotating brush and had a bellows for generating suction. [4] [5] Another early model (1869) was the "Whirlwind", invented in Chicago in 1868 by Ives W. McGaffey. The bulky device worked with a belt driven fan ...

  6. Bathtub curve - Wikipedia

    en.wikipedia.org/wiki/Bathtub_curve

    The bathtub curve is a particular shape of a failure rate graph. This graph is used in reliability engineering and deterioration modeling. The 'bathtub' refers to the shape of a line that curves up at both ends, similar in shape to a bathtub. The bathtub curve has 3 regions: The first region has a decreasing failure rate due to early failures.

  7. Defy Media - Wikipedia

    en.wikipedia.org/wiki/Defy_Media

    Defy Media was an American digital media company that produced original online content for the 12–34 age group. Originally founded in 1996 as Alloy Online (later Alloy Digital ), the final company was formed in 2013 by its merger with Break Media .

  8. The Hoover Company - Wikipedia

    en.wikipedia.org/wiki/The_Hoover_Company

    The first upright vacuum cleaner was invented in June 1908 in North Canton, Ohio, by department store janitor and occasional inventor James Murray Spangler.Spangler was an asthmatic, and suspecting the carpet sweeper he was using at work was the cause of his ailment, he created a basic suction-sweeper by mounting an electric fan motor on a carpet sweeper and then adding a soap box and a broom ...

  9. Cyclonic separation - Wikipedia

    en.wikipedia.org/wiki/Cyclonic_separation

    A high-speed rotating (air)flow is established within a cylindrical or conical container called a cyclone. Air flows in a helical pattern, beginning at the top (wide end) of the cyclone and ending at the bottom (narrow) end before exiting the cyclone in a straight stream through the center of the cyclone and out the top.