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Application filed by Jaroslav Gebauer, Borivoj Ing Pavelka, Josef Folta, Ladislav LopaurfiledCriticalJaroslav Gebauer
Priority to CS839760ApriorityCriticalpatent/CS244462B1/en
Publication of CS976083A1publicationCriticalpatent/CS976083A1/en
Publication of CS244462B1publicationCriticalpatent/CS244462B1/en