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Application filed by Karel Bajak, Mikulenka Jiri, Bajak Zdenek, Oldrich SekaninafiledCriticalKarel Bajak
Priority to CS882844ApriorityCriticalpatent/CS266939B1/en
Publication of CS284488A1publicationCriticalpatent/CS284488A1/en
Publication of CS266939B1publicationCriticalpatent/CS266939B1/en