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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL24939384ApriorityCriticalpatent/PL139754B1/en
Publication of PL249393A2publicationCriticalpatent/PL249393A2/en
Publication of PL139754B1publicationCriticalpatent/PL139754B1/en