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Priority to JP1987100524UpriorityCriticalpatent/JPH0615786Y2/ja
Priority to KR1019880007186Aprioritypatent/KR920003095B1/ko
Publication of JPS645884UpublicationCriticalpatent/JPS645884U/ja
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Publication of JPH0615786Y2publicationCriticalpatent/JPH0615786Y2/ja