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Application filed by Vaclav Ing ChroustovskyfiledCriticalVaclav Ing Chroustovsky
Priority to CS825544ApriorityCriticalpatent/CS238722B1/en
Publication of CS554482A1publicationCriticalpatent/CS554482A1/en
Publication of CS238722B1publicationCriticalpatent/CS238722B1/en