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Priority to JP1981028897UpriorityCriticalpatent/JPH0218514Y2/ja
Priority to US06/351,314prioritypatent/US4451718A/en
Priority to EP82101500Aprioritypatent/EP0061020B2/en
Priority to DE8282101500Tprioritypatent/DE3267964D1/de
Publication of JPS57140146UpublicationCriticalpatent/JPS57140146U/ja
Application grantedgrantedCritical
Publication of JPH0218514Y2publicationCriticalpatent/JPH0218514Y2/ja