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Priority to DD17620674ApriorityCriticalpatent/DD117083A2/xx
Priority to BG2885575Aprioritypatent/BG22585A1/xx
Priority to SU752114326Aprioritypatent/SU643532A1/ru
Priority to HU75II00000210Aprioritypatent/HU172666B/hu
Priority to CS100175Aprioritypatent/CS193117B1/cs
Publication of DD117083A2publicationCriticalpatent/DD117083A2/xx