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Application filed by Frantisek Ing Spicak, Svatoslav Ing ZichafiledCriticalFrantisek Ing Spicak
Priority to CS863332ApriorityCriticalpatent/CS269822B1/en
Publication of CS333286A1publicationCriticalpatent/CS333286A1/en
Publication of CS269822B1publicationCriticalpatent/CS269822B1/en