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Application filed by Frantisek Ing Jirik, Vladimir Ing ViktorafiledCriticalFrantisek Ing Jirik
Priority to CS822754ApriorityCriticalpatent/CS232019B1/en
Publication of CS275482A1publicationCriticalpatent/CS275482A1/en
Publication of CS232019B1publicationCriticalpatent/CS232019B1/en