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Priority to JP3300980UpriorityCriticalpatent/JPS5915595Y2/ja
Priority to US06/239,188prioritypatent/US4487242A/en
Publication of JPS56139784UpublicationCriticalpatent/JPS56139784U/ja
Application grantedgrantedCritical
Publication of JPS5915595Y2publicationCriticalpatent/JPS5915595Y2/ja