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Application filed by Ivan Pecival, Ervin Herold, Josef Ing KalousfiledCriticalIvan Pecival
Priority to CS835045ApriorityCriticalpatent/CS236723B1/en
Publication of CS504583A1publicationCriticalpatent/CS504583A1/en
Publication of CS236723B1publicationCriticalpatent/CS236723B1/en