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Priority to JP8982785UpriorityCriticalpatent/JPH0522394Y2/ja
Priority to GB8525253Aprioritypatent/GB2176740B/en
Priority to US06/789,276prioritypatent/US4638731A/en
Priority to DE19853537560prioritypatent/DE3537560A1/de
Publication of JPS61205690UpublicationCriticalpatent/JPS61205690U/ja
Application grantedgrantedCritical
Publication of JPH0522394Y2publicationCriticalpatent/JPH0522394Y2/ja