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Priority to DD19125076ApriorityCriticalpatent/DD124094A1/xx
Publication of DD124094A1publicationCriticalpatent/DD124094A1/xx
Priority to SU772449664Aprioritypatent/SU902161A1/ru
Priority to CS97577Aprioritypatent/CS213612B1/cs
Priority to HU77EE2475Aprioritypatent/HU173981B/hu