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Application filed by Ivan Halamek, Vladimir Hammer, Petr StoupalfiledCriticalIvan Halamek
Priority to CS84962ApriorityCriticalpatent/CS239724B1/en
Publication of CS96284A1publicationCriticalpatent/CS96284A1/en
Publication of CS239724B1publicationCriticalpatent/CS239724B1/en