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Application filedfiledCritical
Priority to CS628371ApriorityCriticalpatent/CS157523B1/cs
Priority to DE19722240364prioritypatent/DE2240364A1/de
Priority to IT2835872Aprioritypatent/IT964135B/it
Priority to GB4030072Aprioritypatent/GB1347179A/en
Publication of CS157523B1publicationCriticalpatent/CS157523B1/cs