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Application filedfiledCritical
Priority to DD16360572ApriorityCriticalpatent/DD97115A1/xx
Publication of DD97115A1publicationCriticalpatent/DD97115A1/xx
Priority to DE19732326656prioritypatent/DE2326656A1/de
Priority to CS413973Aprioritypatent/CS175639B1/cs
Priority to SU731931988Aprioritypatent/SU605333A1/ru