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Priority to JP16842886UpriorityCriticalpatent/JPS6374047U/ja
Priority to KR2019870018471Uprioritypatent/KR900009965Y1/ko
Priority to US07/115,730prioritypatent/US4891539A/en
Publication of JPS6374047UpublicationCriticalpatent/JPS6374047U/ja
