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Priority to JP5912374UpriorityCriticalpatent/JPS534206Y2/ja
Priority to US05/499,917prioritypatent/US3969095A/en
Publication of JPS50152267UpublicationCriticalpatent/JPS50152267U/ja
Application grantedgrantedCritical
Publication of JPS534206Y2publicationCriticalpatent/JPS534206Y2/ja