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Application filed by Lubomir Vetrovec, Jindrich Vetrovec, Jindrich Ing WankafiledCriticalLubomir Vetrovec
Priority to CS853838ApriorityCriticalpatent/CS254764B1/en
Publication of CS383885A1publicationCriticalpatent/CS383885A1/en
Publication of CS254764B1publicationCriticalpatent/CS254764B1/en