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Priority to JP1988155572UpriorityCriticalpatent/JPH0753278Y2/ja
Priority to DE19893931905prioritypatent/DE3931905A1/de
Publication of JPH0227689UpublicationCriticalpatent/JPH0227689U/ja
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Publication of JPH0753278Y2publicationCriticalpatent/JPH0753278Y2/ja