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Application filed by Ziemowit Kopalnia Wegla KamienfiledCriticalZiemowit Kopalnia Wegla Kamien
Priority to PL29668892ApriorityCriticalpatent/PL169466B1/en
Publication of PL296688A2publicationCriticalpatent/PL296688A2/en
Publication of PL169466B1publicationCriticalpatent/PL169466B1/en