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Priority to JP1990402553UpriorityCriticalpatent/JPH0742399Y2/ja
Priority to TW81104223Aprioritypatent/TW222607B/zh
Publication of JPH0493697UpublicationCriticalpatent/JPH0493697U/ja
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Publication of JPH0742399Y2publicationCriticalpatent/JPH0742399Y2/ja