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Application filed by Frantisek Ing Trcka, Vaclav Ing MachfiledCriticalFrantisek Ing Trcka
Priority to CS82854ApriorityCriticalpatent/CS243707B1/en
Publication of CS85482A1publicationCriticalpatent/CS85482A1/en
Publication of CS243707B1publicationCriticalpatent/CS243707B1/en