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Priority to JP1977038905UpriorityCriticalpatent/JPS5921483Y2/ja
Priority to GB1230878Aprioritypatent/GB1570845A/en
Publication of JPS53133178UpublicationCriticalpatent/JPS53133178U/ja
Application grantedgrantedCritical
Publication of JPS5921483Y2publicationCriticalpatent/JPS5921483Y2/ja