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Kolkata: Shri Pralhad Joshi, Hon’ble Minister of Coal, Mines & Parliamentary Affairs visits the IndianOil stall at Imternational Mining, Equipment, minerals & metals exhibition in Kolkata. IndianOil is promoting its world class lubricant Brand “SERVO” and explosives brand “INDOGEL”. More than 250 exhibitors from 22 countries are displaying its products, equipments, technologies and R&D on this platform.