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Priority to JP11924687UpriorityCriticalpatent/JPH0348085Y2/ja
Publication of JPS6424013UpublicationCriticalpatent/JPS6424013U/ja
Priority to US07/598,746prioritypatent/US5203661A/en
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Publication of JPH0348085Y2publicationCriticalpatent/JPH0348085Y2/ja