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Application filed by Pavol Ing Csc Petrik, Karel Ing DousafiledCriticalPavol Ing Csc Petrik
Priority to CS849872ApriorityCriticalpatent/CS252366B1/en
Publication of CS987284A1publicationCriticalpatent/CS987284A1/en
Publication of CS252366B1publicationCriticalpatent/CS252366B1/en