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2. Sonicare - Wikipedia

   en.wikipedia.org/wiki/Sonicare

   A Philips Sonicare 5100. This model has 2 cleaning modes . The brush head vibrates at hundreds of times per second, with the latest models at 31,000 strokes per minute (517 Hz) or 62,000 movements per minute [1] (1033 Hz).

3. File:Phillips Sonicare 5100 with black brushing head.jpg

   en.wikipedia.org/wiki/File:Phillips_Sonicare...

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4. Electric toothbrush - Wikipedia

   en.wikipedia.org/wiki/Electric_toothbrush

   A typical electric toothbrush. An electric toothbrush, motorized toothbrush, or battery-powered toothbrush is a toothbrush that makes rapid automatic bristle motions, either back-and-forth oscillation or rotation-oscillation (where the brush head alternates clockwise and counterclockwise rotation), in order to clean teeth.

5. Philips PM5540 - Wikipedia

   en.wikipedia.org/wiki/Philips_PM5540

   The content and layout of the pattern, as well as the generator, was designed and made by Danish engineer Finn Hendil (1939–2011) at the Philips TV & Test Equipment laboratory in Amager, south of Copenhagen in 1965–66. [4] It has been used in Australia, Spain, United Arab Emirates, [5] Denmark, [6] Israel, [7] Qatar, and the Netherlands.

6. Philips circle pattern - Wikipedia

   en.wikipedia.org/wiki/Philips_circle_pattern

   In Denmark, where the Philips circle pattern was invented, it was used by its national broadcaster Danmarks Radio (DR) from its launch of regular colour broadcasts in 1970, [132] immediately replacing Test Card F and Philips PM5552, [133] and later on the monochrome Pye Test Card G and Philips PM5540; as well as its first nationwide commercial ...

7. Hankyu 5100 series - Wikipedia

   en.wikipedia.org/wiki/Hankyu_5100_series

   The 5100 series was introduced across all three of Hankyu Railway's trunk lines in 1971. [3] By 1979, 90 vehicles were built by Alna Kōki. [5] In addition, the 5100 series was the first mass-produced train type to feature air-conditioning from new.