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Application filed by Kopalnia Wegla Kamiennego PokofiledCriticalKopalnia Wegla Kamiennego Poko
Priority to PL24895184ApriorityCriticalpatent/PL137846B2/en
Publication of PL248951A2publicationCriticalpatent/PL248951A2/en
Publication of PL137846B2publicationCriticalpatent/PL137846B2/en