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Application filed by Katowice Kopalnia Wegla KamienfiledCriticalKatowice Kopalnia Wegla Kamien
Priority to PL29956293ApriorityCriticalpatent/PL171574B1/en
Publication of PL299562A1publicationCriticalpatent/PL299562A1/en
Publication of PL171574B1publicationCriticalpatent/PL171574B1/en