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Priority to JP1988051682UpriorityCriticalpatent/JP2538759Y2/ja
Priority to KR1019880010289Aprioritypatent/KR890004163A/ko
Publication of JPH01154449UpublicationCriticalpatent/JPH01154449U/ja
Priority to US07/520,842prioritypatent/US5062292A/en
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Publication of JP2538759Y2publicationCriticalpatent/JP2538759Y2/ja