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Priority to JP1981056495UpriorityCriticalpatent/JPH0222162Y2/ja
Priority to KR1019820001236Aprioritypatent/KR830008778A/ko
Publication of JPS57170904UpublicationCriticalpatent/JPS57170904U/ja
Priority to KR2019860002204Uprioritypatent/KR860000919Y1/ko
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Publication of JPH0222162Y2publicationCriticalpatent/JPH0222162Y2/ja