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Priority to JP1989084493UpriorityCriticalpatent/JP2518226Y2/ja
Priority to US07/553,388prioritypatent/US5102164A/en
Priority to DE4023187Aprioritypatent/DE4023187C2/de
Publication of JPH0324906UpublicationCriticalpatent/JPH0324906U/ja
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Publication of JP2518226Y2publicationCriticalpatent/JP2518226Y2/ja