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Application filed by Jiri Ing Sponer, Frantisek Ing HalafiledCriticalJiri Ing Sponer
Priority to CS865518ApriorityCriticalpatent/CS257247B1/cs
Publication of CS551886A1publicationCriticalpatent/CS551886A1/cs
Publication of CS257247B1publicationCriticalpatent/CS257247B1/cs