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Application filed by Kopalnia Wegla Kamiennego SierfiledCriticalKopalnia Wegla Kamiennego Sier
Priority to PL23998282ApriorityCriticalpatent/PL133729B2/en
Publication of PL239982A2publicationCriticalpatent/PL239982A2/en
Publication of PL133729B2publicationCriticalpatent/PL133729B2/en