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Application filed by Jozef Ing Vondra, Mraz VladimirfiledCriticalJozef Ing Vondra
Priority to CS871368ApriorityCriticalpatent/CS269508B1/cs
Publication of CS136887A1publicationCriticalpatent/CS136887A1/cs
Publication of CS269508B1publicationCriticalpatent/CS269508B1/cs