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Priority to JP1987026105UpriorityCriticalpatent/JPH0436287Y2/ja
Priority to US07/160,043prioritypatent/US4838715A/en
Publication of JPS63132756UpublicationCriticalpatent/JPS63132756U/ja
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Publication of JPH0436287Y2publicationCriticalpatent/JPH0436287Y2/ja