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Priority to JP12642086UpriorityCriticalpatent/JPS6331924U/ja
Priority to US07/082,130prioritypatent/US4828460A/en
Priority to KR1019870008786Aprioritypatent/KR900003698B1/ko
Priority to CA000544277Aprioritypatent/CA1291315C/en
Publication of JPS6331924UpublicationCriticalpatent/JPS6331924U/ja