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Priority to JP1986109600UpriorityCriticalpatent/JP2521960Y2/ja
Priority to US07/073,985prioritypatent/US4833553A/en
Publication of JPS6316650UpublicationCriticalpatent/JPS6316650U/ja
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Publication of JP2521960Y2publicationCriticalpatent/JP2521960Y2/ja