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Assemble the Arithmetic Kit and discover how the Mechanical Addiator and Mechanical Multiplier work.
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Tachometer 3D constructor is a fully functional wooden model of a tachometer.
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The fun and educational alternative to the classic coin solution. Now you have an answer to any question with a 3D Randomizer.
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Mechanical constructor The Variator is a fully functional wooden model of the variator.
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The Curvimeter is used to measure the length of curved lines on topographic maps, charts, schemes, and plans. It is a common tool for map-makers, tourists, and road services.
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