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Priority to JP1987185240UpriorityCriticalpatent/JPH0439797Y2/ja
Priority to US07/278,800prioritypatent/US4995581A/en
Publication of JPH0189247UpublicationCriticalpatent/JPH0189247U/ja
Application grantedgrantedCritical
Publication of JPH0439797Y2publicationCriticalpatent/JPH0439797Y2/ja
