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Application filed by Kopalnia Wegla Kamiennego Wiec, Maszyn Wiertniczych I GorniczyfiledCriticalKopalnia Wegla Kamiennego Wiec
Priority to PL24456883ApriorityCriticalpatent/PL140043B1/en
Publication of PL244568A1publicationCriticalpatent/PL244568A1/en
Publication of PL140043B1publicationCriticalpatent/PL140043B1/en