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Priority to JP7288776UpriorityCriticalpatent/JPS52163422U/ja
Priority to GB604177Aprioritypatent/GB1524934A/en
Priority to IT5293877Uprioritypatent/IT219962Z2/it
Priority to FR7704527Aprioritypatent/FR2341488A1/fr
Priority to DE19772707117prioritypatent/DE2707117C3/de
Publication of JPS52163422UpublicationCriticalpatent/JPS52163422U/ja