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Priority to JP1974059535UpriorityCriticalpatent/JPS5533471Y2/ja
Priority to US05/572,896prioritypatent/US4011592A/en
Publication of JPS50149008UpublicationCriticalpatent/JPS50149008U/ja
Application grantedgrantedCritical
Publication of JPS5533471Y2publicationCriticalpatent/JPS5533471Y2/ja