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Priority to JP1989009035UpriorityCriticalpatent/JPH0299189U/ja
Priority to US07/384,738prioritypatent/US4942705A/en
Priority to KR1019890012749Aprioritypatent/KR930006407B1/ko
Publication of JPH0299189UpublicationCriticalpatent/JPH0299189U/ja