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Priority to JP17720186UpriorityCriticalpatent/JPH0518696Y2/ja
Priority to EP87300874Aprioritypatent/EP0233724B1/en
Priority to DE8787300874Tprioritypatent/DE3778179D1/de
Publication of JPS6383656UpublicationCriticalpatent/JPS6383656U/ja
Priority to US07/222,394prioritypatent/US4913158A/en
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Publication of JPH0518696Y2publicationCriticalpatent/JPH0518696Y2/ja