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Priority to JP1989131421UpriorityCriticalpatent/JPH0368567U/ja
Priority to US07/586,646prioritypatent/US5086658A/en
Priority to KR1019900015274Aprioritypatent/KR940010656B1/ko
Publication of JPH0368567UpublicationCriticalpatent/JPH0368567U/ja