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Application filed by Vaclav Ing Velechovsky, Jan Ing Zdebor, Jiri Ing HorskyfiledCriticalVaclav Ing Velechovsky
Priority to CS885576ApriorityCriticalpatent/CS267041B1/en
Publication of CS557688A1publicationCriticalpatent/CS557688A1/en
Publication of CS267041B1publicationCriticalpatent/CS267041B1/en