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Priority to JP1989039377UpriorityCriticalpatent/JPH02130773U/ja
Priority to US07/447,495prioritypatent/US5135152A/en
Priority to DE3940705Aprioritypatent/DE3940705C2/de
Priority to KR1019890018237Aprioritypatent/KR930004875B1/ko
Publication of JPH02130773UpublicationCriticalpatent/JPH02130773U/ja