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Application filed by Kopalnia Wegla Kamiennego PowsfiledCriticalKopalnia Wegla Kamiennego Pows
Priority to PL29076791ApriorityCriticalpatent/PL165479B1/en
Publication of PL290767A1publicationCriticalpatent/PL290767A1/en
Publication of PL165479B1publicationCriticalpatent/PL165479B1/en