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Priority to JP2029781UpriorityCriticalpatent/JPS638997Y2/ja
Priority to US06/275,713prioritypatent/US4493988A/en
Priority to GB8120483Aprioritypatent/GB2079459B/en
Priority to DE3127141Aprioritypatent/DE3127141C2/de
Priority to FR8113717Aprioritypatent/FR2486647A1/fr
Publication of JPS57137059UpublicationCriticalpatent/JPS57137059U/ja
Application grantedgrantedCritical
Publication of JPS638997Y2publicationCriticalpatent/JPS638997Y2/ja