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  • The sunscreen mechanism of titanium dioxide Date: 2020-07-21 10:40:22 Click: 165 Comment: 0

    According to the different wavelengths, ultraviolet rays are divided into short-wave regions 190-280nm, medium-wave regions 280-320nm, and long-wave regions 320-400nm. Ultraviolet rays in the short-wave area have the highest energy, but they...

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