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Priority to JP1988036574UpriorityCriticalpatent/JPH0638206Y2/ja
Priority to US07/315,306prioritypatent/US4899541A/en
Publication of JPH01140064UpublicationCriticalpatent/JPH01140064U/ja
Application grantedgrantedCritical
Publication of JPH0638206Y2publicationCriticalpatent/JPH0638206Y2/ja