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  2. Jewellery cleaning - Wikipedia

    en.wikipedia.org/wiki/Jewellery_cleaning

    Ultrasonic cleaner showing the removable basket in place, and a closeup of the light and timer Ultrasonic cleaners are useful for jewelry cleaning and removing tarnish. They use ultrasound waves and chemicals combined to create bubbles that "cling" to the foreign particles such as dirt, oil, and unknown substances.

  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. Kmart - Wikipedia

    en.wikipedia.org/wiki/Kmart

    Kmart's longest lasting logo, used from 1969 to 1990. Under the leadership of executive Harry Cunningham, S.S. Kresge Company opened the first Kmart-named store, at 27,000 square feet (2,500 square meters), which was referred to by Kresge as a "bantam" Kmart and was in fact originally intended to be a Kresge store until late in the planning process, on January 25, 1962, in San Fernando ...

  5. Ultrasound - Wikipedia

    en.wikipedia.org/wiki/Ultrasound

    Similar to ultrasonic cleaning, biological cells including bacteria can be disintegrated. High power ultrasound produces cavitation that facilitates particle disintegration or reactions. This has uses in biological science for analytical or chemical purposes ( sonication and sonoporation ) and in killing bacteria in sewage.

  6. S. S. Kresge - Wikipedia

    en.wikipedia.org/wiki/S._S._Kresge

    Kresge was born near Allentown, Pennsylvania, the son of Sebastian Kresge and the former Catherine Kunkle.Living on the family farm in Kresgeville (named for his ancestors) until he was 21 years old, he was educated in the local public schools, the Fairview Academy, in Brodheadsville, Pennsylvania, and at the Eastman Business College in Poughkeepsie, New York, from which he graduated in March ...

  7. Coin cleaning - Wikipedia

    en.wikipedia.org/wiki/Coin_cleaning

    Coin cleaning is the controversial process of removing undesirable substances from a coin's surface in order to make it more attractive to potential buyers. The subject is disputed among the numismatic community whether cleaning coins is necessary. Those that argue in favor of cleaning are also in dispute on which methods work best.

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