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Application filed by Eduard Ing Trink, Jozef Ing MrazfiledCriticalEduard Ing Trink
Priority to CS873291ApriorityCriticalpatent/CS261839B1/en
Publication of CS329187A1publicationCriticalpatent/CS329187A1/en
Publication of CS261839B1publicationCriticalpatent/CS261839B1/en