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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL29683692ApriorityCriticalpatent/PL167208B1/en
Publication of PL296836A1publicationCriticalpatent/PL296836A1/en
Publication of PL167208B1publicationCriticalpatent/PL167208B1/en