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Application filed by Inst Odlewnictwa, Przed Projektowania I RealizacfiledCriticalInst Odlewnictwa
Priority to PL27006388ApriorityCriticalpatent/PL157895B1/en
Publication of PL270063A1publicationCriticalpatent/PL270063A1/en
Publication of PL157895B1publicationCriticalpatent/PL157895B1/en