DEV INDUSTRIES Address: 303, Janpath Comm. Centre, Opp. Capital Comm. Centre, Ashram Road, Ahmedabad-380 009, Gujarat, India. Contact Person: Manufacturer of Sodium Tungstate, Ammonium Molybdate, Calcium Tungstate & Other Salts, Sodium Molybdate, Molybdium Sulphide, Tungstic Acid, Molybdic Acid, Ammonium Para Tungstane, Cobalt Salt