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Priority to JP1987112640UpriorityCriticalpatent/JPH0537861Y2/ja
Priority to US07/217,788prioritypatent/US4915340A/en
Priority to DE3824712Aprioritypatent/DE3824712C2/de
Publication of JPS6417845UpublicationCriticalpatent/JPS6417845U/ja
Application grantedgrantedCritical
Publication of JPH0537861Y2publicationCriticalpatent/JPH0537861Y2/ja
