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Iran's Oil Minister Bijan Zanganeh speaks during the opening ceremony of the 24th International Oil, Gas, Refining & Petrochemical Exhibition in Tehran, Iran, on May 1, 2019. (Xinhua/Ahmad Halabisaz)
24th Int'l Oil, Gas, Refining & Petrochemical Exhibition held in Tehran, Iran
Source：Xinhua| 2019-05-02 13:33:32|Editor: Shi Yinglun
