The main industrial activities o the oblast' are: chemical mechanical ingineerin, pumpin an energy mechanical ingineerin, agricultural machine-construction, instrument-makkin industry an radio electronics, technical equipment production for processin fields o agro-industrial complexes, minin an iron ore production industry, polygraph industry an medicine production, ile an gas processin, chemical production, film an photo material production (See: Svema), an chemical fertilizer production. In general, there are 273 lairge industry enterprises an 327 sma industry enterprises.