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Priority to JP1987057407UpriorityCriticalpatent/JPH0633228Y2/ja
Priority to US07/169,509prioritypatent/US4842258A/en
Publication of JPS63164638UpublicationCriticalpatent/JPS63164638U/ja
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Publication of JPH0633228Y2publicationCriticalpatent/JPH0633228Y2/ja