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Priority to JP1990059193UpriorityCriticalpatent/JPH0723211Y2/ja
Priority to US07/695,701prioritypatent/US5149091A/en
Publication of JPH0417913UpublicationCriticalpatent/JPH0417913U/ja
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Publication of JPH0723211Y2publicationCriticalpatent/JPH0723211Y2/ja