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Priority to JP1989071654UpriorityCriticalpatent/JP2552882Y2/ja
Priority to US07/530,694prioritypatent/US5060607A/en
Priority to DE4019644Aprioritypatent/DE4019644A1/de
Publication of JPH0319406UpublicationCriticalpatent/JPH0319406U/ja
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Publication of JP2552882Y2publicationCriticalpatent/JP2552882Y2/ja