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Priority to CS885674ApriorityCriticalpatent/CS171079B1/cs
Priority to IT3030675Aprioritypatent/IT1050784B/it
Priority to DE19752556774prioritypatent/DE2556774A1/de
Priority to GB5175875Aprioritypatent/GB1492138A/en
Publication of CS171079B1publicationCriticalpatent/CS171079B1/cs