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Priority to JP11674690UpriorityCriticalpatent/JPH083937Y2/ja
Publication of JPH0472515UpublicationCriticalpatent/JPH0472515U/ja
Priority to US08/144,484prioritypatent/US5442149A/en
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Publication of JPH083937Y2publicationCriticalpatent/JPH083937Y2/ja