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Application filed by Alois Ing Slof, Karel Ing MatyasfiledCriticalAlois Ing Slof
Priority to CS874619ApriorityCriticalpatent/CS261278B1/en
Publication of CS461987A1publicationCriticalpatent/CS461987A1/en
Publication of CS261278B1publicationCriticalpatent/CS261278B1/en