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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL29144491ApriorityCriticalpatent/PL165535B1/en
Publication of PL291444A1publicationCriticalpatent/PL291444A1/en
Publication of PL165535B1publicationCriticalpatent/PL165535B1/en