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Priority to JP1988054541UpriorityCriticalpatent/JPH01160496U/ja
Priority to US07/338,725prioritypatent/US5033351A/en
Priority to KR1019890005295Aprioritypatent/KR920008289B1/ko
Priority to GB8909314Aprioritypatent/GB2217900B/en
Publication of JPH01160496UpublicationCriticalpatent/JPH01160496U/ja