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Application filed by Kopalnia Wegla Kamiennego PokofiledCriticalKopalnia Wegla Kamiennego Poko
Priority to PL24628684ApriorityCriticalpatent/PL136573B2/en
Publication of PL246286A2publicationCriticalpatent/PL246286A2/en
Publication of PL136573B2publicationCriticalpatent/PL136573B2/en