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Application filed by Kopalnia Wegla Kamiennego PowsfiledCriticalKopalnia Wegla Kamiennego Pows
Priority to PL24840184ApriorityCriticalpatent/PL144071B3/en
Publication of PL248401A3publicationCriticalpatent/PL248401A3/en
Publication of PL144071B3publicationCriticalpatent/PL144071B3/en