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Priority to JP1981070398UpriorityCriticalpatent/JPS6232953Y2/ja
Priority to US06/306,759prioritypatent/US4444294A/en
Priority to DE3140655Aprioritypatent/DE3140655C2/de
Priority to FR8119907Aprioritypatent/FR2495563B1/fr
Publication of JPS57181690UpublicationCriticalpatent/JPS57181690U/ja
Application grantedgrantedCritical
Publication of JPS6232953Y2publicationCriticalpatent/JPS6232953Y2/ja