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Priority to JP1988107933UpriorityCriticalpatent/JPH0230254U/ja
Priority to KR1019890011626Aprioritypatent/KR910007671B1/ko
Priority to US07/394,444prioritypatent/US5001379A/en
Publication of JPH0230254UpublicationCriticalpatent/JPH0230254U/ja