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Application filed by Karel Ing Houfek, Josef Zinecker, Eduard CelasfiledCriticalKarel Ing Houfek
Priority to CS832829ApriorityCriticalpatent/CS234273B1/en
Publication of CS282983A1publicationCriticalpatent/CS282983A1/en
Publication of CS234273B1publicationCriticalpatent/CS234273B1/en