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Priority to JP1989064812UpriorityCriticalpatent/JPH0746812Y2/ja
Publication of JPH034921UpublicationCriticalpatent/JPH034921U/ja
Priority to US07/817,546prioritypatent/US5174170A/en
Application grantedgrantedCritical
Publication of JPH0746812Y2publicationCriticalpatent/JPH0746812Y2/ja
