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Application filed by Josef Ing Zeitler, Rostislav Ing Hanak, Sevcik FrantisekfiledCriticalJosef Ing Zeitler
Priority to CS83472ApriorityCriticalpatent/CS231442B1/cs
Publication of CS47283A1publicationCriticalpatent/CS47283A1/cs
Publication of CS231442B1publicationCriticalpatent/CS231442B1/cs