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Application filed by Petr Ing Hainz, Vaclav Ing KopeckyfiledCriticalPetr Ing Hainz
Priority to CS828911ApriorityCriticalpatent/CS238959B1/en
Publication of CS891182A1publicationCriticalpatent/CS891182A1/en
Publication of CS238959B1publicationCriticalpatent/CS238959B1/en