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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL27062588ApriorityCriticalpatent/PL154379B1/en
Publication of PL270625A2publicationCriticalpatent/PL270625A2/en
Publication of PL154379B1publicationCriticalpatent/PL154379B1/en