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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL29360892ApriorityCriticalpatent/PL167008B1/en
Publication of PL293608A1publicationCriticalpatent/PL293608A1/en
Publication of PL167008B1publicationCriticalpatent/PL167008B1/en