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Application filed by Alojz Ing Masan, Pavol MasanfiledCriticalAlojz Ing Masan
Priority to CS886531ApriorityCriticalpatent/CS267793B1/en
Publication of CS653188A1publicationCriticalpatent/CS653188A1/en
Publication of CS267793B1publicationCriticalpatent/CS267793B1/en