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Priority to JP9305975UpriorityCriticalpatent/JPS527786U/ja
Priority to AU15270/76Aprioritypatent/AU498704B2/en
Priority to GB26875/76Aprioritypatent/GB1549033A/en
Priority to DE2628940Aprioritypatent/DE2628940C2/de
Priority to CA255,788Aprioritypatent/CA1055460A/en
Publication of JPS527786UpublicationCriticalpatent/JPS527786U/ja
Priority to US06/590,288prioritypatent/US4530477A/en