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Application filed by Josef Hrdina, Vaclav Ing Malimanek, Josef SvejdafiledCriticalJosef Hrdina
Priority to CS829924ApriorityCriticalpatent/CS232049B1/cs
Publication of CS992482A1publicationCriticalpatent/CS992482A1/cs
Publication of CS232049B1publicationCriticalpatent/CS232049B1/cs