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Application filed by Ladislav Spalensky, Jiri Mateja, Josef Herynk, Kitzler Jaroslav, Hajek KarelfiledCriticalLadislav Spalensky
Priority to CS817572ApriorityCriticalpatent/CS239509B1/en
Publication of CS757281A1publicationCriticalpatent/CS757281A1/en
Publication of CS239509B1publicationCriticalpatent/CS239509B1/en