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Priority to JP1987198153UpriorityCriticalpatent/JPH01101239U/ja
Priority to KR1019880017423Aprioritypatent/KR930007456B1/ko
Priority to US07/291,450prioritypatent/US4958179A/en
Publication of JPH01101239UpublicationCriticalpatent/JPH01101239U/ja
Priority to US07/403,580prioritypatent/US4961084A/en