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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.
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 ...
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 ...
There are different electric toothbrush heads designed for sensitive teeth and gums, increased stain removal, or different-sized bristles for tight or gapped teeth. [citation needed] The hand motion with an electric toothbrush is different from a manual toothbrush. They are meant to have the bristles do the work by just placing and moving the ...
Alpine skiing is an Olympic sport, contested at the Winter Olympic Games.The first Winter Olympics, held in 1924, included nordic skiing, but the first alpine skiing events were not held until 1936 in Garmisch-Partenkirchen, Germany. [1]
The Rickenbacker 360 is an electric, semi-acoustic guitar made by Rickenbacker, and part of the Rickenbacker 300 Series.The instrument incorporates many features standard on Rickenbacker guitars, including a three-ply maple/walnut neck, shallow headstock angle, a thick rosewood fretboard finished with clear conversion varnish, and double truss rods.
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