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Priority to JP1985087777UpriorityCriticalpatent/JPH042969Y2/ja
Priority to US06/752,224prioritypatent/US4660228A/en
Publication of JPS61202422UpublicationCriticalpatent/JPS61202422U/ja
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Publication of JPH042969Y2publicationCriticalpatent/JPH042969Y2/ja