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2. Sonicare - Wikipedia

   en.wikipedia.org/wiki/Sonicare

   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). Rather than connecting to its charger with conductors, it uses inductive charging —the charger includes the primary winding of the voltage-reducing transformer and the handle of ...

3. The best electric toothbrushes of 2025, according to dentists

   www.aol.com/lifestyle/best-electric-toothbrush...

   The toothbrush has the features we’d expect of a high-powered electric toothbrush, including a two-minute timer and multiple brush speeds — the real luxury is in the flossing capabilities ...

4. Oral-B - Wikipedia

   en.wikipedia.org/wiki/Oral-B

   2012: Oral-B Trizone 1000 electric toothbrush with brush head shape and brushing technique similar to a manual brush. 2014: the first toothbrush with Bluetooth 4.0 Oral-B SmartSeries technology. 2017: New version of the battery, holds a charge 2 times longer and charges 2 times faster. 2019: Genius X toothbrush with artificial intelligence.

5. Electric toothbrush - Wikipedia

   en.wikipedia.org/wiki/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.

6. Saab 17 - Wikipedia

   en.wikipedia.org/wiki/Saab_17

   The definitive B 17A used the Swedish-built STWC-3 (Swedish Twin Wasp C-3), an unlicenced copy of the R-1830. The B 17B used a Bristol Mercury XXIV built by Svenska Flygmotor AB (SFA) in Sweden, and the B 17C used an imported 1,060 hp (790 kW) Piaggio P.XI radial from Italy. [ 4 ]

7. Pratt & Whitney JT8D - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_JT8D

   The JT8D is an axial-flow front turbofan engine incorporating a two-spool design. There are two coaxially-mounted independent rotating assemblies: one rotating assembly for the low pressure compressor (LPC) which consists of the first six stages (i.e. six pairs of rotating and stator blades, including the first two stages which are for the bypass turbofan), driven by the second (downstream ...