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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL28746990ApriorityCriticalpatent/PL168325B1/en
Publication of PL287469A1publicationCriticalpatent/PL287469A1/en
Publication of PL168325B1publicationCriticalpatent/PL168325B1/en