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Priority to JP7238289UpriorityCriticalpatent/JPH0312120U/ja
Priority to US07/540,006prioritypatent/US5038031A/en
Priority to DE4019794Aprioritypatent/DE4019794C2/de
Priority to KR1019900009298Aprioritypatent/KR910002136A/ko
Publication of JPH0312120UpublicationCriticalpatent/JPH0312120U/ja
