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Priority to JP8045672UpriorityCriticalpatent/JPS5229009Y2/ja
Priority to US00369215Aprioritypatent/US3852788A/en
Publication of JPS4939432UpublicationCriticalpatent/JPS4939432U/ja
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Publication of JPS5229009Y2publicationCriticalpatent/JPS5229009Y2/ja