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Application filed by POLTEGOR-INSTYTUT Instytut Górnictwa OdkrywkowegofiledCriticalPOLTEGOR-INSTYTUT Instytut Górnictwa Odkrywkowego
Priority to PL389220ApriorityCriticalpatent/PL214841B1/pl
Publication of PL389220A1publicationCriticalpatent/PL389220A1/pl
Publication of PL214841B1publicationCriticalpatent/PL214841B1/pl