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Priority to JP1990000754UpriorityCriticalpatent/JPH0394905U/ja
Priority to US07/629,559prioritypatent/US5110466A/en
Priority to KR1019900022378Aprioritypatent/KR970007943B1/ko
Publication of JPH0394905UpublicationCriticalpatent/JPH0394905U/ja