I see vintage watches repaired. When the case is opened the movements are so well-designed and engineered, with gear teeth cut to the 0.1 MM level and thin, perfect jewels. How is such mechanical precision possible from decades ago?
In: Engineering
Well, today we produce nanometer technology (watch some youtube videos about CPUs, wafers and such and you will get an idea of this). So it is not too astounding that we produced 0.1mm precision gears and such decades ago.
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