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Priority to JP1989105798UpriorityCriticalpatent/JPH0726763Y2/ja
Priority to US07/574,692prioritypatent/US5261112A/en
Publication of JPH0344744UpublicationCriticalpatent/JPH0344744U/ja
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Publication of JPH0726763Y2publicationCriticalpatent/JPH0726763Y2/ja