Immediately after the war, rapid development of the city began. Ryazan became a major industrial, scientific, and military center of the European part of Russia. Massive factories were constructed in the city, occupying the entire urban areas. Such establishments included the largest refinery in Europe, the Soviet Union's only producer of potato-harvesting equipment - Ryazselmash Plant, accounting machines, a machine-tool plant, heavy forging equipment, foundry Centrolit, chemical fiber company, instrument factory and others. Leading areas of industry are heavy and non-ferrous metallurgy, oil refining and machine-tool industry, mechanical engineering and food industries. More than half of the plants produce for export.