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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. Philips - Wikipedia

   en.wikipedia.org/wiki/Philips

   Gerard Philips (1858–1942), founder. The Philips Company was founded in 1891, by Dutch entrepreneur Gerard Philips and his father Frederik Philips. Frederik, a banker based in Zaltbommel, financed the purchase and setup of an empty factory building in Eindhoven, where the company started the production of carbon-filament lamps and other electro-technical products in 1892.

4. CP Class 4700 - Wikipedia

   en.wikipedia.org/wiki/CP_Class_4700

   Class 4700 are a series of medium power electric locomotives built by Siemens for Comboios de Portugal, the state owned railway company of Portugal.