Arak is one of industrial cities of Iran, that in terms of diversity is the 1st, in terms of heavy industries is the 2nd and totally is one of four industrial hubs of Iran. This city because of the heavy industries, manufacturing 80% of Iran energy equipment, the largest Iranian Machinery company (MSA), the largest heavy equipment manufacturer in the Middle East, the largest locomotive and wagon manufacturer in the Middle East, the largest Aluminum company in Iran, the largest crane manufacturer in the Middle East, Iran's largest mineral company and the largest combine manufacturer in the Middle East; nicknamed the Industrial Capital of Iran.