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Priority to JP14988176UpriorityCriticalpatent/JPS5366906U/ja
Priority to US05/847,223prioritypatent/US4179721A/en
Priority to GB46501/77Aprioritypatent/GB1592577A/en
Priority to DE19772749965prioritypatent/DE2749965A1/de
Publication of JPS5366906UpublicationCriticalpatent/JPS5366906U/ja