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Priority to JP1979139463UpriorityCriticalpatent/JPH0219881Y2/ja
Priority to GB8030757Aprioritypatent/GB2065949B/en
Priority to US06/190,743prioritypatent/US4374529A/en
Priority to DE19803037403prioritypatent/DE3037403A1/de
Publication of JPS5660153UpublicationCriticalpatent/JPS5660153U/ja
Application grantedgrantedCritical
Publication of JPH0219881Y2publicationCriticalpatent/JPH0219881Y2/ja