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Priority to JP1989148715UpriorityCriticalpatent/JP2520865Y2/ja
Priority to US07/631,923prioritypatent/US5098152A/en
Publication of JPH0386819UpublicationCriticalpatent/JPH0386819U/ja
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Publication of JP2520865Y2publicationCriticalpatent/JP2520865Y2/ja
