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Priority to JP2510771UpriorityCriticalpatent/JPS515201Y2/ja
Priority to US00240210Aprioritypatent/US3805980A/en
Publication of JPS4719201UpublicationCriticalpatent/JPS4719201U/ja
Application grantedgrantedCritical
Publication of JPS515201Y2publicationCriticalpatent/JPS515201Y2/ja