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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).
Even the Sonicare 4100 budget model offers all the must-have features you'd expect in an electric toothbrush, like a two-minute timer, a pressure sensor and two intensity settings.
The Philips Sonicare electric toothbrush line is extremely beloved by reviewers and dentists. For us, it lost out the top spot to Oral-B based on expert testimony, and the brands’ use of sonic ...
The engine is direct-drive and is fitted with alternators, silencers, vacuum pump drives and dual-ignition systems as standard equipment.. It was developed from the Jabiru 2200 and 3300 aeroengines, but whilst these earlier modular-design engines share the same bore and stroke (97.5mm x 74 mm), the 5100 flat-eight shares only the 97.5mm bore, and the stroke is increased from 74mm to 85mm.
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Numbers 5100 (the original 1903 prototype number 99 now being renumbered for the third time), 5123, 5118, 5145, 5124, 5126, 5120, 5116, 5133 and 5115, were renumbered 8100 to 8109. This 8100 class were intended to bolster the 6100 class on London suburban duties, with the smaller driving wheels giving a supposed benefit of better acceleration ...