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Priority to JP1990122194UpriorityCriticalpatent/JP2522577Y2/ja
Priority to US07/771,226prioritypatent/US5342003A/en
Publication of JPH0477769UpublicationCriticalpatent/JPH0477769U/ja
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Publication of JP2522577Y2publicationCriticalpatent/JP2522577Y2/ja
