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Application filed by Kopalnia Wegla Kamiennego StasfiledCriticalKopalnia Wegla Kamiennego Stas
Priority to PL94304098ApriorityCriticalpatent/PL173566B1/en
Publication of PL304098A1publicationCriticalpatent/PL304098A1/en
Publication of PL173566B1publicationCriticalpatent/PL173566B1/en