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Application filed by Kopalnia Wegla BrunatnegofiledCriticalKopalnia Wegla Brunatnego
Priority to PL19241476ApriorityCriticalpatent/PL109767B1/en
Publication of PL192414A1publicationCriticalpatent/PL192414A1/en
Publication of PL109767B1publicationCriticalpatent/PL109767B1/en