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Priority to JP1987103051UpriorityCriticalpatent/JPH079715Y2/ja
Priority to US07/213,227prioritypatent/US4950031A/en
Priority to DE3822585Aprioritypatent/DE3822585A1/de
Publication of JPS648457UpublicationCriticalpatent/JPS648457U/ja
Application grantedgrantedCritical
Publication of JPH079715Y2publicationCriticalpatent/JPH079715Y2/ja
