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Priority to JP14164379UpriorityCriticalpatent/JPS6136983Y2/ja
Priority to US06/195,852prioritypatent/US4319822A/en
Publication of JPS5660926UpublicationCriticalpatent/JPS5660926U/ja
Application grantedgrantedCritical
Publication of JPS6136983Y2publicationCriticalpatent/JPS6136983Y2/ja