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Priority to JP1989106033UpriorityCriticalpatent/JPH0347780U/ja
Priority to DE4011778Aprioritypatent/DE4011778C2/de
Priority to KR9005088Aprioritypatent/KR930003292B1/ko
Priority to US07/508,628prioritypatent/US5074453A/en
Publication of JPH0347780UpublicationCriticalpatent/JPH0347780U/ja