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Priority to JP8600668ApriorityCriticalpatent/JPS509448B1/ja
Priority to GB55450/69Aprioritypatent/GB1263119A/en
Priority to DE1957637Aprioritypatent/DE1957637C3/de
Priority to US877887Aprioritypatent/US3660619A/en
Publication of JPS509448B1publicationCriticalpatent/JPS509448B1/ja