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Application filed by Jan Ing Plevka, Vojtech Ing Sapak, Bures JaroslavfiledCriticalJan Ing Plevka
Priority to CS834777ApriorityCriticalpatent/CS238672B1/en
Publication of CS477783A1publicationCriticalpatent/CS477783A1/en
Publication of CS238672B1publicationCriticalpatent/CS238672B1/en