At the beginning of the 1960s, Azarab Industries and Arak Machinery, which used to be a single company, became two separate companies. Also, in the oil industry, from the beginning of the 1980s, petrochemicals and refineries were first removed from the National Persian Oil Company, then they were not integrated and were handed over separately. This problem has become known as island thinking in Homeland. products Types of construction steel, I-BEAM and H-BEAM, were designed and produced for the first time in the country by Isfahan Zob Ahn Joint Stock Company.