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Application filed by Przed Materialow OgniotrwalychfiledCriticalPrzed Materialow Ogniotrwalych
Priority to PL30148993ApriorityCriticalpatent/PL171767B1/en
Publication of PL301489A1publicationCriticalpatent/PL301489A1/en
Publication of PL171767B1publicationCriticalpatent/PL171767B1/en