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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL25514285ApriorityCriticalpatent/PL139761B2/en
Publication of PL255142A2publicationCriticalpatent/PL255142A2/en
Publication of PL139761B2publicationCriticalpatent/PL139761B2/en