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Priority to JP7644273UpriorityCriticalpatent/JPS5256496Y2/ja
Priority to GB1084674Aprioritypatent/GB1465785A/en
Publication of JPS5023740UpublicationCriticalpatent/JPS5023740U/ja
Priority to US05/606,605prioritypatent/US4021188A/en
Application grantedgrantedCritical
Publication of JPS5256496Y2publicationCriticalpatent/JPS5256496Y2/ja