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Application filed by Milan Popelka, Mirko Popelka, Karel Ing Csc DavidfiledCriticalMilan Popelka
Priority to CS570687ApriorityCriticalpatent/CS273118B1/en
Publication of CS570687A1publicationCriticalpatent/CS570687A1/en
Publication of CS273118B1publicationCriticalpatent/CS273118B1/en