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Priority to JP1988137515UpriorityCriticalpatent/JPH0418434Y2/ja
Publication of JPH0166155UpublicationCriticalpatent/JPH0166155U/ja
Priority to GB8923653Aprioritypatent/GB2224635B/en
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Publication of JPH0418434Y2publicationCriticalpatent/JPH0418434Y2/ja