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Priority to JP12850472UpriorityCriticalpatent/JPS5120275Y2/ja
Priority to CA175,911Aprioritypatent/CA976154A/en
Priority to AU57921/73Aprioritypatent/AU469424B2/en
Priority to US05/378,133prioritypatent/US3943421A/en
Publication of JPS4981981UpublicationCriticalpatent/JPS4981981U/ja
Application grantedgrantedCritical
Publication of JPS5120275Y2publicationCriticalpatent/JPS5120275Y2/ja