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Priority to JP2612785UpriorityCriticalpatent/JPH0518682Y2/ja
Priority to CN86100963.0Aprioritypatent/CN1004447B/zh
Publication of JPS61143052UpublicationCriticalpatent/JPS61143052U/ja
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Publication of JPH0518682Y2publicationCriticalpatent/JPH0518682Y2/ja