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Priority to JP1990060878UpriorityCriticalpatent/JP2503477Y2/ja
Priority to US07/711,777prioritypatent/US5142740A/en
Publication of JPH0419296UpublicationCriticalpatent/JPH0419296U/ja
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Publication of JP2503477Y2publicationCriticalpatent/JP2503477Y2/ja
