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Priority to JP1988060966UpriorityCriticalpatent/JP2501272Y2/ja
Priority to US07/348,539prioritypatent/US4969002A/en
Publication of JPH01166344UpublicationCriticalpatent/JPH01166344U/ja
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Publication of JP2501272Y2publicationCriticalpatent/JP2501272Y2/ja
