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Priority to JP1990060162UpriorityCriticalpatent/JPH0421835U/ja
Priority to KR1019910009005Aprioritypatent/KR930011091B1/ko
Priority to US07/710,987prioritypatent/US5212989A/en
Priority to DE4118824Aprioritypatent/DE4118824C2/de
Publication of JPH0421835UpublicationCriticalpatent/JPH0421835U/ja
