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Application filed by Ludvik Petr, Jiri Ing Kalacek, Bohuslav Ing Veverka, Kopecky PavelfiledCriticalLudvik Petr
Priority to CS858520ApriorityCriticalpatent/CS255752B1/en
Publication of CS852085A1publicationCriticalpatent/CS852085A1/en
Publication of CS255752B1publicationCriticalpatent/CS255752B1/en