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Another innovation lies in the novel materials used for the wheels. Traditional brass and steel have been replaced by carbon crystal-coated silicon. 60% harder and 70% lighter in weight than steel, it’s also non-magnetic and resistant to corrosion, as well as having extremely smooth surfaces.
Хотя из текст можно понять и наоборот - из кремния с алмазным покрытием, но тамошние спецы настаивали именно на алмазе как основном материале.
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