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Application filed by Petrovsky Ivan, Vaclav Simunek, Jaroslav FleischmannfiledCriticalPetrovsky Ivan
Priority to CS85520ApriorityCriticalpatent/CS244055B1/en
Publication of CS52085A1publicationCriticalpatent/CS52085A1/en
Publication of CS244055B1publicationCriticalpatent/CS244055B1/en