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Application filed by Bohumir Ing Michal, Vladislav SkoumalfiledCriticalBohumir Ing Michal
Priority to CS886325ApriorityCriticalpatent/CS269419B1/cs
Publication of CS632588A1publicationCriticalpatent/CS632588A1/cs
Publication of CS269419B1publicationCriticalpatent/CS269419B1/cs