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Priority to JP16003385UpriorityCriticalpatent/JP2500808Y2/ja
Priority to US06/918,909prioritypatent/US4786987A/en
Publication of JPS6268357UpublicationCriticalpatent/JPS6268357U/ja
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Publication of JP2500808Y2publicationCriticalpatent/JP2500808Y2/ja