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These materials are widely used in environmental and energy fields such as catalytic purification of motor vehicle exhaust, catalytic combustion of natural gas, and catalytic purification of organic waste gas. The main products include rare earth manganese zirconium composite oxides and cerium zirconium based composite oxides. The performance of rare earth manganese zirconium composite oxides and cerium zirconium based composite oxides produced by GRIREM have reached or approached international advanced levels.