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Priority to JP1987059044UpriorityCriticalpatent/JPH0717872Y2/ja
Priority to US07/179,232prioritypatent/US4856355A/en
Publication of JPS63166748UpublicationCriticalpatent/JPS63166748U/ja
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Publication of JPH0717872Y2publicationCriticalpatent/JPH0717872Y2/ja