TEHRAN (Shana) -- The 26th International Oil, Gas, Refining and Petrochemical Exhibition, Iran Oil Show, opened on Friday morning (May 13) with participation of Iranian Minister of Petroleum, Javad Owji, Iran’s Parliament Speaker, Mohammad Baqer Qalibaf, a number of Parliamentarians, the CEO of the National Iranian Oil Company, Mohsen Khojasteh Mehr, as well as the oil industry’s senior officials at Tehran International Permanent Fairground.