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People visit the international helicopter industry exhibition HeliRussia 2019 in Moscow, Russia, on May 16, 2019. The exhibition is held here from May 16 to May 18. (Xinhua/Alexander Zemlianichenko Jr)
People visit the international helicopter industry exhibition HeliRussia 2019 in Moscow, Russia, on May 16, 2019. The exhibition is held here from May 16 to May 18. (Xinhua/Alexander Zemlianichenko Jr)