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2. Reversing drum mixer - Wikipedia

   en.wikipedia.org/wiki/Reversing_drum_mixer

   Industrial sized reversing drum mixers can have a capacity of 9 m³ and can produce a mid quality concrete mix in as little as 40 seconds. Reversing drum mixers provide for efficient mixing and leave very little build up within the mixer. [2] Wear is reduced as the drum rests on rubber or polyurethane wheels and there is no steel on steel ...

3. Sturmey-Archer - Wikipedia

   en.wikipedia.org/wiki/Sturmey-Archer

   In 1966 Sturmey-Archer launched a new two-speed hub with a backpedal shifting action similar to the Fichtel and Sachs 'Torpedo Zwei Gang Duomatic'. The S2 – Sturmey-Archer's first 2-speed hub since the demise of the T series in 1941 and the last two speed they would make in the UK – featured a direct drive and a 28.6% gear reduction.

4. Cam timer - Wikipedia

   en.wikipedia.org/wiki/Cam_timer

   An electric motor drives a shaft on which is arranged a series of cams or a drum studded with pegs along its surface. Associated with each cam is one or more switches.The motor rotates at a fixed speed, and the camshaft is driven through a speed reducing gearbox at a convenient slow speed.

5. Tatra 148 - Wikipedia

   en.wikipedia.org/wiki/Tatra_148

   The main and auxiliary gears were fully synchronized except the first and reverse gear. Main gearbox – 5+1 (2-5 gear synchronized) gear ratios – (1)9.97, (2)4.96, (3)2.83, (4)1.68, (5)1.0, (R)8.58; Auxiliary gearbox – 2 speed (electro-pneumatic control via switch on the gear lever and clutch pedal activated ) gear ratios – (L)2.20, (H)1.62

6. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   In either case, the standard method for minimizing arc formation and preventing contact damage is to use a fast-moving switch mechanism, typically using a spring-operated tipping-point mechanism to assure quick motion of switch contacts, regardless of the speed at which the switch control is operated by the user. Movement of the switch control ...

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