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Priority to JP13984087UpriorityCriticalpatent/JPH068680Y2/ja
Priority to KR1019880002446Aprioritypatent/KR900007823B1/ko
Publication of JPS6443648UpublicationCriticalpatent/JPS6443648U/ja
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Publication of JPH068680Y2publicationCriticalpatent/JPH068680Y2/ja