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Priority to JP9977375UpriorityCriticalpatent/JPS561073Y2/ja
Priority to GB38170/75Aprioritypatent/GB1528128A/en
Priority to US05/613,975prioritypatent/US4071803A/en
Priority to DE19752541886prioritypatent/DE2541886C2/de
Publication of JPS5213771UpublicationCriticalpatent/JPS5213771U/ja
Application grantedgrantedCritical
Publication of JPS561073Y2publicationCriticalpatent/JPS561073Y2/ja