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Priority to JP1989025407UpriorityCriticalpatent/JP2504838Y2/ja
Priority to US07/488,121prioritypatent/US4988328A/en
Priority to EP90104240Aprioritypatent/EP0386685B1/en
Publication of JPH02115787UpublicationCriticalpatent/JPH02115787U/ja
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Publication of JP2504838Y2publicationCriticalpatent/JP2504838Y2/ja