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Application filed by Inst Tech Material Elekt, Zaklad Sprzetu ElektrogrzejnegfiledCriticalInst Tech Material Elekt
Priority to PL24749984ApriorityCriticalpatent/PL143102B1/en
Publication of PL247499A1publicationCriticalpatent/PL247499A1/en
Publication of PL143102B1publicationCriticalpatent/PL143102B1/en