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Application filed by Josef Smisek, Karel Blesik, Vladimir Ing Bednar, Oldrich SedlacekfiledCriticalJosef Smisek
Priority to CS875808ApriorityCriticalpatent/CS267217B1/cs
Publication of CS580887A1publicationCriticalpatent/CS580887A1/cs
Publication of CS267217B1publicationCriticalpatent/CS267217B1/cs