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Priority to JP11303590UpriorityCriticalpatent/JPH0470231U/ja
Priority to US07/834,314prioritypatent/US5257899A/en
Priority to PCT/JP1991/000804prioritypatent/WO1991019577A1/ja
Priority to KR1019920700325Aprioritypatent/KR100224079B1/ko
Publication of JPH0470231UpublicationCriticalpatent/JPH0470231U/ja