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Priority to JP9907275UpriorityCriticalpatent/JPS5213837U/ja
Priority to DE2631866Aprioritypatent/DE2631866C3/de
Priority to DE19767622414Uprioritypatent/DE7622414U1/de
Priority to GB29810/76Aprioritypatent/GB1513975A/en
Priority to CA257,286Aprioritypatent/CA1051235A/en
Priority to US05/706,153prioritypatent/US4103583A/en
Publication of JPS5213837UpublicationCriticalpatent/JPS5213837U/ja