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Priority to JP1987141017UpriorityCriticalpatent/JPS6446478U/ja
Priority to US07/238,078prioritypatent/US4926013A/en
Priority to DE3830608Aprioritypatent/DE3830608A1/de
Priority to KR1019880011896Aprioritypatent/KR930008810B1/ko
Publication of JPS6446478UpublicationCriticalpatent/JPS6446478U/ja