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Fwa Entènasyonal Optik Shanghai
20yèm SIOF 2021 Shanghai International Optics Fair SIOF 2021 la te fèt soti 6 rive 8 me 2021 nan Shanghai World Expo Convention & Convention Center. Se te premye fwa optik nan peyi Lachin apre pandemi covid-19 la. Gras a...Li plis