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Priority to JP1989071056UpriorityCriticalpatent/JP2536244Y2/ja
Priority to DE4018989Aprioritypatent/DE4018989A1/de
Publication of JPH0346053UpublicationCriticalpatent/JPH0346053U/ja
Priority to US07/744,686prioritypatent/US5185923A/en
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Publication of JP2536244Y2publicationCriticalpatent/JP2536244Y2/ja