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Application filed by Otakar Ing Helis, Arnold Ing Mollein, Zdenek Ing Csc Jach, Bretislav Javorsky, Petr Zerava, Emil ZylafiledCriticalOtakar Ing Helis
Priority to CS867864ApriorityCriticalpatent/CS258843B1/en
Publication of CS786486A1publicationCriticalpatent/CS786486A1/en
Publication of CS258843B1publicationCriticalpatent/CS258843B1/en