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Henan Energy Group Kaifeng Air Subsidiary Three Technologies or National Patents
Recently, the patent for the separation and recovery of argon and methane in synthetic ammonia release gas from the application of the Henan Nenghua Group Kaifeng Air Subsidiary was granted by the State Intellectual Property Office. In addition, the step-end face ring groove machine tool cutter and the cylindrical membrane wall full symmetry group have been granted utility model patents for two patents for tooling.