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Priority to JP1988045651UpriorityCriticalpatent/JPH0547460Y2/ja
Priority to US07/193,112prioritypatent/US4962446A/en
Publication of JPH01153630UpublicationCriticalpatent/JPH01153630U/ja
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Publication of JPH0547460Y2publicationCriticalpatent/JPH0547460Y2/ja