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Priority to JP602487UpriorityCriticalpatent/JPS63115720U/ja
Priority to DE3704574Aprioritypatent/DE3704574C2/de
Priority to US07/014,322prioritypatent/US4771368A/en
Publication of JPS63115720UpublicationCriticalpatent/JPS63115720U/ja
Priority to KR2019910019703Uprioritypatent/KR920007925Y1/ko