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Application filed by Staszic Kopalnia Wegla KamiennfiledCriticalStaszic Kopalnia Wegla Kamienn
Priority to PL28644990ApriorityCriticalpatent/PL164059B1/en
Publication of PL286449A1publicationCriticalpatent/PL286449A1/en
Publication of PL164059B1publicationCriticalpatent/PL164059B1/en