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Application filed by Wesola Kopalnia Wegla KamiennefiledCriticalWesola Kopalnia Wegla Kamienne
Priority to PL29956193ApriorityCriticalpatent/PL170759B1/en
Publication of PL299561A1publicationCriticalpatent/PL299561A1/en
Publication of PL170759B1publicationCriticalpatent/PL170759B1/en