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Application filed by Kopalnia Wegla Kamiennego ManifiledCriticalKopalnia Wegla Kamiennego Mani
Priority to PL23713182ApriorityCriticalpatent/PL136920B1/en
Publication of PL237131A1publicationCriticalpatent/PL237131A1/en
Publication of PL136920B1publicationCriticalpatent/PL136920B1/en