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Priority to JP1990001369UpriorityCriticalpatent/JPH0393004U/ja
Priority to KR1019910000078Aprioritypatent/KR950000166B1/ko
Priority to DE4100351Aprioritypatent/DE4100351C2/de
Publication of JPH0393004UpublicationCriticalpatent/JPH0393004U/ja
Priority to US07/861,336prioritypatent/US5183362A/en
