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Priority to JP6923085UpriorityCriticalpatent/JPS61184127U/ja
Priority to US06/812,405prioritypatent/US4781653A/en
Priority to DE19853546171prioritypatent/DE3546171A1/de
Priority to GB8531880Aprioritypatent/GB2169380B/en
Publication of JPS61184127UpublicationCriticalpatent/JPS61184127U/ja