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Priority to JP1987021067UpriorityCriticalpatent/JPH0238936Y2/ja
Priority to GB8802971Aprioritypatent/GB2202551B/en
Publication of JPS63131760UpublicationCriticalpatent/JPS63131760U/ja
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Publication of JPH0238936Y2publicationCriticalpatent/JPH0238936Y2/ja